tag:blogger.com,1999:blog-42916820647948921932024-02-19T04:37:08.174+02:00Oscilaţii şi unde (fizică distractivă)Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.comBlogger421125tag:blogger.com,1999:blog-4291682064794892193.post-30582149349936739292022-09-05T09:41:00.001+03:002022-09-25T09:43:57.016+03:00Egreta care generează unde<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGEkSxJSNaR2NrjCd3YdQV9Jv6h9AF-9cPpm4qk6HpAKO6yyTWm3Ge0cY2EFBYSdqvlrNW37fuICT1B5lbfKnMS7GN6Z2fsRvw1a3432EsbCGVhhmzlft93Qg09Xe1w7RhG31TFeBjWoePqTrmLL70Cl5a-Mom4KmHUnDgjRPd3RhW6r4Mz0ajSwYmZA/s720/egreta-valuri-unde.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="540" data-original-width="720" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGEkSxJSNaR2NrjCd3YdQV9Jv6h9AF-9cPpm4qk6HpAKO6yyTWm3Ge0cY2EFBYSdqvlrNW37fuICT1B5lbfKnMS7GN6Z2fsRvw1a3432EsbCGVhhmzlft93Qg09Xe1w7RhG31TFeBjWoePqTrmLL70Cl5a-Mom4KmHUnDgjRPd3RhW6r4Mz0ajSwYmZA/s320/egreta-valuri-unde.jpg" width="320" /></a></div><br /> <p></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-31554297458471357422022-08-08T08:26:00.001+03:002022-08-08T08:26:06.642+03:00Irizaţii pe parasolar<p>Am capturat într-o parcare din centrul oraşului curcubeiele de pe un parasolar, pus să uşureze munca climatizorului dintr-un automobil.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYPDKiao33czz477Hp0Etg9TblcB46qeFuWQ4U5SgJOL1mO3FsEvOPwiebA0JESLOwFOrFpCTFzxG2-EvKkZ8CQ0CCpWZ5FRI8wPopdMgzX1C2MkBMHRVoJuVCiIpLLIJmPh6lWuDK1ZLkkWq7uIXK-EWK_vPMP7oI5uTnuws9NPzV5D7AKWJxc5Fb_w/s800/irizatii-pe-parasolar.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYPDKiao33czz477Hp0Etg9TblcB46qeFuWQ4U5SgJOL1mO3FsEvOPwiebA0JESLOwFOrFpCTFzxG2-EvKkZ8CQ0CCpWZ5FRI8wPopdMgzX1C2MkBMHRVoJuVCiIpLLIJmPh6lWuDK1ZLkkWq7uIXK-EWK_vPMP7oI5uTnuws9NPzV5D7AKWJxc5Fb_w/s320/irizatii-pe-parasolar.jpg" width="320" /></a></div><br /><p><br /></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-5656182971270202022-05-01T10:07:00.001+03:002022-05-03T10:14:43.703+03:00Fântână arteziană solară<p> O corolă de celule solare şi o mică pompă creează o atmosferă plăcută în grădină.</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghgdKXxuFx6w6rLpF_ox7a5I_0Ae3cjeGmzV5sO_iiOalQr3stnQAcbHp2n0pgEZDusuOnjaV9-PzofBFsSA4zRlSXVjIfG9rV-LVNXGhZp55P87O2kPUMRv_GKKT2bm2pudHTBR80Z5TEve5HWioBvEhQ1yqsYIiIUWZ_eftEXph1xNH9QiGF96NLig/s960/fantana-arteziana-solara.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="960" data-original-width="720" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghgdKXxuFx6w6rLpF_ox7a5I_0Ae3cjeGmzV5sO_iiOalQr3stnQAcbHp2n0pgEZDusuOnjaV9-PzofBFsSA4zRlSXVjIfG9rV-LVNXGhZp55P87O2kPUMRv_GKKT2bm2pudHTBR80Z5TEve5HWioBvEhQ1yqsYIiIUWZ_eftEXph1xNH9QiGF96NLig/s320/fantana-arteziana-solara.jpg" width="240" /></a></div><br /><p></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-73674499690705654482022-02-25T10:34:00.009+02:002022-05-03T10:36:34.140+03:00Un curcubeu difuz<p><span class="d2edcug0 hpfvmrgz qv66sw1b c1et5uql lr9zc1uh a8c37x1j fe6kdd0r mau55g9w c8b282yb keod5gw0 nxhoafnm aigsh9s9 d3f4x2em iv3no6db jq4qci2q a3bd9o3v b1v8xokw oo9gr5id" dir="auto">O
descompunere irizată a luminii răsăritului de Soare de către dâra de
vapori lăsată de avionul care patrulează în Nord-Vestul României<br />(e prima dată când observ un astfel de „curcubeu”)</span></p><p><span class="d2edcug0 hpfvmrgz qv66sw1b c1et5uql lr9zc1uh a8c37x1j fe6kdd0r mau55g9w c8b282yb keod5gw0 nxhoafnm aigsh9s9 d3f4x2em iv3no6db jq4qci2q a3bd9o3v b1v8xokw oo9gr5id" dir="auto"></span></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2zLFmQ8Oac2PPSeBnnlt2kyicT6Z1wW8fvkmAaPZQ4J51q8l9fad7oUd9vYsk2Qr_nDkA5sFTdqOpYnMUqE3iVQZ-83IOIt6Pk61tpOrYgb2LIYHUk5SEAlAWP-dxuvLgvh3LvBqP2JOe22_NHS9d03GWJfUjnKJRPAouJDYlZX0cTCgnFcBq6C589g/s766/curcubeu-difuz-25-februarie-2022.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="574" data-original-width="766" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2zLFmQ8Oac2PPSeBnnlt2kyicT6Z1wW8fvkmAaPZQ4J51q8l9fad7oUd9vYsk2Qr_nDkA5sFTdqOpYnMUqE3iVQZ-83IOIt6Pk61tpOrYgb2LIYHUk5SEAlAWP-dxuvLgvh3LvBqP2JOe22_NHS9d03GWJfUjnKJRPAouJDYlZX0cTCgnFcBq6C589g/s320/curcubeu-difuz-25-februarie-2022.jpg" width="320" /></a></div><br /> <p></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-80136671540323551222022-02-04T20:13:00.001+02:002022-02-05T08:22:11.113+02:00Efecte optice curioase<p> Azi dimineaţă, Mirel Matyas a fotografiat înainte de răsărit acest halo generat de particulele de gheaţă din atmosfera Zalăului.<br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEh7d7WZcpP83u_jkS6XMyrA5YD6dqH7-YlszdXSjvFY18rjD5ztGQR__F6Lv6Kn79o66vofgimeMLSV6A7zwr91KMFmZNrS4tsskxKLSqExspS329NMCMzm7u2OUKP268rWHE1hgzl5sSV31HojkfAonb9TD-c3YAxfcShVuPruQ7aHeWKLiHQ-OJuvbQ=s800" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEh7d7WZcpP83u_jkS6XMyrA5YD6dqH7-YlszdXSjvFY18rjD5ztGQR__F6Lv6Kn79o66vofgimeMLSV6A7zwr91KMFmZNrS4tsskxKLSqExspS329NMCMzm7u2OUKP268rWHE1hgzl5sSV31HojkfAonb9TD-c3YAxfcShVuPruQ7aHeWKLiHQ-OJuvbQ=s320" width="320" /></a></div><p></p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEg6pxikiVuXKLu1TaOKpRWK98eL7b7mOzftcwX6JI-rqJgmh6KFA0aYR3aA7lY5OT_m_n-loyPMG9yu2nrkdTRezIcWMdEDcgn-_-EdpaR2KrdXKB7aCR4cJ40U6MMrdnRCn-zIFOVg_KcU8huHCd8_l8dBbheILhkmMST8cUq-Orbjl7QZ72habi_nLg=s800" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEg6pxikiVuXKLu1TaOKpRWK98eL7b7mOzftcwX6JI-rqJgmh6KFA0aYR3aA7lY5OT_m_n-loyPMG9yu2nrkdTRezIcWMdEDcgn-_-EdpaR2KrdXKB7aCR4cJ40U6MMrdnRCn-zIFOVg_KcU8huHCd8_l8dBbheILhkmMST8cUq-Orbjl7QZ72habi_nLg=s320" width="320" /></a></div>La apusul Soarelui, un alt fenomen de dispersare a razelor Soarelui, dar în Tenerife, Insulele Canare. Deasupra pantelor vulcanului Teide, vântul a adus grăunţe de nisip din Sahara.<br /><p></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-15071293607834138222021-01-01T13:12:00.005+02:002021-01-01T13:12:48.393+02:00Cărţile anului 2020<p> Revista „Symmetry” a alcătuit o colecţie a celor mai bune cărţi de popularizare a fizicii, apărute în 2020:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjt6uznt-fRLXA26QJ4dRb4Tvasf4CcZL8dbAK9pURgieru7I0QXS-Tdk6b5bBSW9QWBwclERg-vmGRZnFaVXfYor-aWFrBHChDkNW9fegyspi5Ka4aXbwIkqgCgf87bqzzYaBmjChcf7hp/s1000/carti-2020-fizica.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="1000" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjt6uznt-fRLXA26QJ4dRb4Tvasf4CcZL8dbAK9pURgieru7I0QXS-Tdk6b5bBSW9QWBwclERg-vmGRZnFaVXfYor-aWFrBHChDkNW9fegyspi5Ka4aXbwIkqgCgf87bqzzYaBmjChcf7hp/s320/carti-2020-fizica.jpg" width="320" /></a></div><p>Brian Greene - Until the End of Time: Mind, Matter, and Our Search for Meaning in an Evolving Universe<br />Katie Mack - The End of Everything (Astrophysically Speaking) <br />Mario Livio - Galileo and the Science Deniers<br />David Lindley - The Dream Universe: How Fundamental Physics Lost its Way<br />Jim Al-Khalili - The World According to Physics<br />Janna Levin - Black Hole Survival Guide<br />Metin Tolan and Joachim Stolze - Shaken, Not Stirred! James Bond in the Spotlight of Physics<br />Leonard Mlodinow - Stephen Hawking: A Memoir of Friendship and Physics <br />Philip Judge - The Sun: A Very Short Introduction<br />The Physics Book: Big Ideas Simply Explained (with Foreword by Jim Al-Khalili) <br /></p><p><br /></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-30673439215657100592020-12-19T10:23:00.004+02:002020-12-19T10:23:53.213+02:00Cum se poate suspenda un pendul de o cicloidă?<p> </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibHzc7GtYWH6bDkWEadvGLFBb7xh18DnliCxtDaeSc31VNynSXwVLeW1U6Xp9f2gUw6InoVBMJtxBmA0R6ecnrrUg8roZVBrDX8Xkaus6Y2AnTZ3zbnyT76_zl71JTSuoxxkYjkp0VIhhr/s600/mobius-dick.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="400" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibHzc7GtYWH6bDkWEadvGLFBb7xh18DnliCxtDaeSc31VNynSXwVLeW1U6Xp9f2gUw6InoVBMJtxBmA0R6ecnrrUg8roZVBrDX8Xkaus6Y2AnTZ3zbnyT76_zl71JTSuoxxkYjkp0VIhhr/s320/mobius-dick.jpg" /></a></div><p></p><p>Vorbitoarea se lansă imediat într-o peroraţie despre romanul Moby Dick, al cărui capitol 96 tratează despre „cuptoare”: cazane mari în care sunt fierte balenele. Personajul principal, Ishmael, freacă de zor pereţii unuia dintre ele şi, datorită formei lui mai curbate, ajunge la o concluzie remarcabilă: „În geometrie, toate corpurile care alunecă în lungul unei cicloide, aşa cum aluneca atunci piatra mea, cad exact în acelaşi interval de timp, din indiferent care punct”. Herman Melville, evident, ştia că, <i><b>suspendat de o cicloidă</b></i>(!?!), pendulul este izocron.</p><p>(traducere/trădare de <b>Petru Iamandi</b>)<br /></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-79213839077305424562020-09-30T17:36:00.002+03:002020-09-30T17:36:35.125+03:00Connections (Conexiuni)<p> .</p><p>Iată un serial ştiinţific de excepţie, creat de istoricul James Burke, difuzat de BBC, pornit în 1978 şi continuat cu încă două serii. </p>
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<iframe width="560" height="315" src="https://www.youtube.com/embed/XetplHcM7aQ" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-77563076138325606402020-06-11T08:41:00.009+03:002021-01-17T08:58:28.456+02:00Un program transformat în sit<p> Firma <i>Kitty Hawk Software</i> a realizat un program de calculator care folosea animaţii Flash ca să-i învete pe copii cum să realizeze, pas cu pas, avioane de hârtie. Iată că modelele respective au fost grupate pe un sit unde acum se poate învăţa online arta împăturirii unor aparate care zboară:</p><p><a href="https://paperairplaneshq.com/">https://paperairplaneshq.com/</a></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbPsW4lOkSoQf5hbI3CFHIYjriU58yBPt3WUxBSNkvQKbipLIBv1MMtRv2yIuf0kwqtvh3vyxglMqs4hFmzFrvAOezp59EiJdv3DKOw3aUhR3oOe7tTxktwCerEw4Bg3YIa-8rGg9VpQFO/s1279/avioane-kitty-hawk.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="835" data-original-width="1279" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbPsW4lOkSoQf5hbI3CFHIYjriU58yBPt3WUxBSNkvQKbipLIBv1MMtRv2yIuf0kwqtvh3vyxglMqs4hFmzFrvAOezp59EiJdv3DKOw3aUhR3oOe7tTxktwCerEw4Bg3YIa-8rGg9VpQFO/s320/avioane-kitty-hawk.jpg" width="320" /></a></div><br /><p><br /></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-48975073343640493482020-06-01T09:12:00.017+03:002020-12-30T09:21:27.087+02:00Winston, motanul fizicianului<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://cdn.dc5.ro/img-prod/451509-1.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="640" data-original-width="432" src="https://cdn.dc5.ro/img-prod/451509-1.jpeg" /></a></div><br /> Winston este motanul din rasa britanică cu păr scurt, găzduit de profesorul Werner Hagedorn: <p></p><p>„Un reprezentant liniştit al speciei umane. Peste zi este mai tot timpul la universitate şi face cercetări: studiază particule care sunt atât de mici, încât nu pot fi văzute cu ochiul liber. Li se spune atomi. Nici Werner nu poate să vadă atomii, şi totuşi ştie că ei există. La fel e şi sora lui. Ea este pastor şi crede şi ea în ceva invizibil. Trăsniţi mai sunt oamenii ăştia!”</p><p>(Frauke Scheunemann - Winston, un motan în misiune secretă) <br /></p><p><br /></p>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-36853896340143389262020-04-29T22:19:00.000+03:002020-04-29T22:19:47.662+03:00„Maria” (Poveste din Cartierul de Vest) la theremin.<br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/Vox-p2WKgWQ" width="560"></iframe>
Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-85628363936159957582019-08-16T12:32:00.001+03:002019-08-16T13:00:05.230+03:00Mahir Cave: Avion de hârtie de lung parcurs 2<span style="color: white;">.</span><br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/sxb3sUPh5RY" width="560"></iframe>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-32157679011038222782019-08-01T12:29:00.000+03:002019-08-16T12:59:19.608+03:00Takuo Toda: Avion de hârtie de lung parcurs 1<span style="color: white;">.</span><br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/1OPuYLg-GDU" width="560"></iframe>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-30485129227139789422019-07-28T12:06:00.000+03:002019-07-28T12:06:43.526+03:00Cană pentru iluminat dimineţile<span style="color: white;">.</span><br />
De la Zilele Zalăului 2019, am primit cadou o cană termosensibilă, pe care apare un bec care „se aprinde” când se toarnă un lichid fierbinte în ea.<br />
NOTA BENE! Atenţie la spălatul cănii, desenul termosensibil este un autocolant. Am păţit-o anterior, de aceea vă spun şi vouă.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7Fjt73IUdYPrJWlQ1QYZuLOCUrTYL9jRBG0er-YWH2jGaKSXc1KCvjlQeVbSPe24b3cXHw9FCZHkIOBT4Ad2dg6F405vkENCoehOOoAWkWd9kONfl4QUetPfu3Cm3suGpotDALC9Ndt2x/s1600/cana-de-iluminat-mintea.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="900" data-original-width="1600" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7Fjt73IUdYPrJWlQ1QYZuLOCUrTYL9jRBG0er-YWH2jGaKSXc1KCvjlQeVbSPe24b3cXHw9FCZHkIOBT4Ad2dg6F405vkENCoehOOoAWkWd9kONfl4QUetPfu3Cm3suGpotDALC9Ndt2x/s320/cana-de-iluminat-mintea.jpg" width="320" /></a></div>
<br />Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-40952275271355013232019-03-13T11:37:00.000+02:002019-09-17T11:40:18.515+03:00Simularea mişcării pendulelor pe calculator<span style="color: white;">.</span><br />
Am găsit pe internet un program scris de <span style="color: blue;"><a href="https://www.vascak.cz/" rel="home" title=" RNDr. Vladimír Vaščák – osobní stránky učitele z Moravy">Vladimír Vaščák</a>,</span> care simulează <a href="http://oscilatii.blogspot.com/2019/03/dansul-pendulelor.html" target="_blank">mişcarea pendulelor din dispozitivul prezentat în 11 martie</a>:<br />
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<a href="https://www.vascak.cz/data/android/physicsatschool/templateimg.php?s=kv_vlnostroj"></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-5amx5ymsqvU96AWDcm3bXoWRujs3ZNOCp77O6dUw2KqCa6FNljAHuk36pdD9CV6glVCwNxeyk_gpZ5sC7dFerMsxo_hE8uRrr8bfrzWhpBE-ERP5Jhj8eJdLQgXqei8Od-VxhhO-prMI/s1600/mach-gep.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="811" data-original-width="1225" height="211" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-5amx5ymsqvU96AWDcm3bXoWRujs3ZNOCp77O6dUw2KqCa6FNljAHuk36pdD9CV6glVCwNxeyk_gpZ5sC7dFerMsxo_hE8uRrr8bfrzWhpBE-ERP5Jhj8eJdLQgXqei8Od-VxhhO-prMI/s320/mach-gep.jpg" width="320" /></a></div>
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<br />
<a href="https://www.vascak.cz/data/android/physicsatschool/templateimg.php?s=kv_vlnostroj">https://www.vascak.cz/data/android/physicsatschool/templateimg.php?s=kv_vlnostroj</a><br />
<br />
Versiunea în limba română a sitului are adresa:<br />
<a href="https://www.vascak.cz/physicsanimations.php?l=ro">https://www.vascak.cz/physicsanimations.php?l=ro</a> Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-42383800067151291272019-03-11T13:23:00.000+02:002019-03-11T13:23:35.737+02:00Dansul pendulelor<span style="color: white;">.</span><br />
Dacă lăsaţi cincisprezece pendule de lungimi crescătoare să oscileze, în timp ele vor forma diferite compuneri ale mişcării (unduiri armonioase):<br />
<br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/RrX2yTGJ6N0" width="560"></iframe>
Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-78174052837486796202019-02-15T08:46:00.000+02:002019-02-15T08:49:55.492+02:00Trenulețul electric Piko.<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG8xi8Rh6AvsZ5I_CSpI8nNehDJ3RRZqZgT3mI6Vir78Qq6KmllMaObZdG2D_TvvNWJMarG4T-8ezlZHQSHrFk6YCu9zSDf1zgx1JTFUXPI7oHKOk0RQ3of6LWwrfjcQAgAzaNe89h_Vo2/s1600/2019febr01.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjG8xi8Rh6AvsZ5I_CSpI8nNehDJ3RRZqZgT3mI6Vir78Qq6KmllMaObZdG2D_TvvNWJMarG4T-8ezlZHQSHrFk6YCu9zSDf1zgx1JTFUXPI7oHKOk0RQ3of6LWwrfjcQAgAzaNe89h_Vo2/s320/2019febr01.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Circuitul șinelor e mai mare decât masa de birou.</td></tr>
</tbody></table>
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj67pbbolyqQpttmgMDvD0EHGYOfDt0MgBtQHX2Lwh01WCahO_ZJ0olBGUEr4F7HeNzobmXBQbKxvISEbwm2tlpgdRngKcKmoHLJZJ56aKJX10hzTWT26jmc5yN2H8Z4V3bZrl3EsaPmkjD/s1600/2019febr02.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj67pbbolyqQpttmgMDvD0EHGYOfDt0MgBtQHX2Lwh01WCahO_ZJ0olBGUEr4F7HeNzobmXBQbKxvISEbwm2tlpgdRngKcKmoHLJZJ56aKJX10hzTWT26jmc5yN2H8Z4V3bZrl3EsaPmkjD/s320/2019febr02.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Ce n-a văzut Parisul...</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFbdZiMFLX95Cc4Zii_MS1oxbdZMDWiYQTSAKOYyIHFDuP9WqAC5kNHWNBs9mi45ITRbSVhylNOqbbysarXVYfNe6eJ9AdQMnLVzfRN91vQqelBTL1v2T556KEUyN7_U6D8kROyUemgD4f/s1600/2019febr03.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFbdZiMFLX95Cc4Zii_MS1oxbdZMDWiYQTSAKOYyIHFDuP9WqAC5kNHWNBs9mi45ITRbSVhylNOqbbysarXVYfNe6eJ9AdQMnLVzfRN91vQqelBTL1v2T556KEUyN7_U6D8kROyUemgD4f/s320/2019febr03.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">O locomotivă de 45 de ani</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPHkY5J43nyDXv4eGZBNc4dEwKsjtZLTEfeZULYf2hhyphenhyphenQ2fqVSckahgAxVv6My3UwFHqQn56oSN0mJ8-XyD409EZsrVxAkY56fsPb7mZjYrnojvoIMGcl7os4YbkGc6bj3CjQUaM80V8kr/s1600/2019febr04.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPHkY5J43nyDXv4eGZBNc4dEwKsjtZLTEfeZULYf2hhyphenhyphenQ2fqVSckahgAxVv6My3UwFHqQn56oSN0mJ8-XyD409EZsrVxAkY56fsPb7mZjYrnojvoIMGcl7os4YbkGc6bj3CjQUaM80V8kr/s320/2019febr04.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Alimentatorul</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbQxjVMJOKAGo_H6fpS5oy5w76ulHdJBIjcZ_TJvEDkItmKI4NRvVQHFKNvfwcMmiDhRn3SK5RmmOFX-cD6CgW1gsBxusNaxxZGWDTJkioSS2npZA1EAHF3X_xJMF909WAzAWbe8DjJ3mN/s1600/2019febr05.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbQxjVMJOKAGo_H6fpS5oy5w76ulHdJBIjcZ_TJvEDkItmKI4NRvVQHFKNvfwcMmiDhRn3SK5RmmOFX-cD6CgW1gsBxusNaxxZGWDTJkioSS2npZA1EAHF3X_xJMF909WAzAWbe8DjJ3mN/s320/2019febr05.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pupitrul de comandă</td></tr>
</tbody></table>
<br />Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-6978727171897905442018-11-16T16:36:00.000+02:002018-11-16T16:36:19.102+02:00Studiul echilibrului mecanic.<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT9Ik4TLGwGeWHSVdWklne27CQpE3jMF8h3wbGZwhTuFqnqjn2akxIB0YpwZhbJgv4a-4jnDCbL4DLZRN-vCP5NqVewtxlb4cy4Y4at6kYJwQAwivus36-gwZrfjz54879hQAmpNPAqsLK/s1600/studiul-echilibrului-mecanic.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT9Ik4TLGwGeWHSVdWklne27CQpE3jMF8h3wbGZwhTuFqnqjn2akxIB0YpwZhbJgv4a-4jnDCbL4DLZRN-vCP5NqVewtxlb4cy4Y4at6kYJwQAwivus36-gwZrfjz54879hQAmpNPAqsLK/s320/studiul-echilibrului-mecanic.jpg" width="320" /></a></div>
.<br />Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-45313046959043683862018-08-14T06:55:00.001+03:002018-08-14T07:00:39.426+03:00Concursul de aruncare a baloanelor umplute cu apă.<br />
Pe măsură ce participanţii se îndepărtează din ce în ce mai mult unul
de celălalt, energia cinetică a balonului umplut cu apă creşte şi
preluarea lui presupune multă îndemânare. Iată-i pe cei mai buni:<br />
<br />
<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/bxvCtNWkcZY" width="560"></iframe><br />
.Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-84445034134747269952018-08-13T23:09:00.004+03:002018-08-14T06:57:11.815+03:00Poştă reactivă pe fir în tabăra din Hida.<br />
<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/eEeat2NElBQ" width="560"></iframe><br />Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-28491155696102821862018-08-13T08:31:00.004+03:002018-08-13T08:57:45.344+03:00Frumoasele Perseide din 2018<span style="color: white;">.</span><br />
Am fi vrut să vedem stelele căzătoare din curentul Perseidelor încă sâmbătă seară, dar a fost înnorat. Ieri seară am avut noroc: către Nord şi Est a fost senin, apoi au dispărut şi norii din Sud. N-a fost Lună deloc. Spectacolul naturii a fost unul deosebit, bruiat doar de o circulaţie animată a avioanelor.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNVXHGzk_gFtxjPGedUcQpdMBkqQNtrguN-jTOf2FZXksIcee0Nf0Xt8SfakGhpMPr1Tx7IapCcZOTOHvA7-FHmiNEVKkV5A9HBA531uk-TTsREkE3px5JSb29upZLX0ZySWtZfRvF_1jd/s1600/perseide2018.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="538" data-original-width="800" height="215" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNVXHGzk_gFtxjPGedUcQpdMBkqQNtrguN-jTOf2FZXksIcee0Nf0Xt8SfakGhpMPr1Tx7IapCcZOTOHvA7-FHmiNEVKkV5A9HBA531uk-TTsREkE3px5JSb29upZLX0ZySWtZfRvF_1jd/s320/perseide2018.jpg" width="320" /></a></div>
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Mulţi meteori au venit de unde erau aşteptaţi, dar au fost şi unii care au săgetat ciudat, împotriva curentului, de la stânga la dreapta, deasupra Carului Mare.<br />
<span style="color: white;">.</span>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com1tag:blogger.com,1999:blog-4291682064794892193.post-63439746072525810672018-07-28T20:36:00.001+03:002018-07-29T17:15:49.276+03:00Eclipsa de Lună din 27 iulie 2018.<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgweJ4Rzp_Rp9lrDKE28BPad8RuUc6o0LHMnfidjQJcC42-dCSi1PLTslnzhNKU1wlMDEokiRpU6SP-Yp7CVX7s8jkjf9sQupPPkiuseHmugAVB7I7he9fIsiG8Y2vv_-G2Y4B8zpIpRfkC/s1600/eclipsa-luna-20180727-stellarium.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1366" height="179" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgweJ4Rzp_Rp9lrDKE28BPad8RuUc6o0LHMnfidjQJcC42-dCSi1PLTslnzhNKU1wlMDEokiRpU6SP-Yp7CVX7s8jkjf9sQupPPkiuseHmugAVB7I7he9fIsiG8Y2vv_-G2Y4B8zpIpRfkC/s320/eclipsa-luna-20180727-stellarium.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Harta stelară a evenimentului</td></tr>
</tbody></table>
Fotografiile au fost făcute cu un aparat foto obişnuit, fără telescop (<i>Canon PowerShot A2500</i>), la HD.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikapF2Q46orvEGl6Tz8QVATZ3c58Rg82Kj62J-CJ9aqGzfPm6lDp5ug4TLrr6voRR-A_NLDuvKwHi8ulXYRAWfeLyYfBf8uY8ypNwb3J5RaSOBrYaXrVHp6Ff7Z6zyRxXrCcGKEYTnNRF3/s1600/eclipsa-luna-20180727-stingere.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1373" height="178" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikapF2Q46orvEGl6Tz8QVATZ3c58Rg82Kj62J-CJ9aqGzfPm6lDp5ug4TLrr6voRR-A_NLDuvKwHi8ulXYRAWfeLyYfBf8uY8ypNwb3J5RaSOBrYaXrVHp6Ff7Z6zyRxXrCcGKEYTnNRF3/s320/eclipsa-luna-20180727-stingere.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Începutul eclipsei</td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjO37LSfet-7wcRYFMQfRbUdG10AoOIOzM2ZPj3A0layU9-kAkzssPrQ3vCsJ4s7TjjJwOV3x9_pZVeycZDvJGRsB4_xNONCJAkxCZerGI2fSciYESEGki6kKI9YJ4ELrGWBcwFXoJspayM/s1600/eclipsa-luna-20180727-totala.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="768" data-original-width="1364" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjO37LSfet-7wcRYFMQfRbUdG10AoOIOzM2ZPj3A0layU9-kAkzssPrQ3vCsJ4s7TjjJwOV3x9_pZVeycZDvJGRsB4_xNONCJAkxCZerGI2fSciYESEGki6kKI9YJ4ELrGWBcwFXoJspayM/s320/eclipsa-luna-20180727-totala.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Faza de maxim :-)</td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
.Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-67658355761414634882018-06-23T06:27:00.000+03:002018-07-16T23:38:34.028+03:00Încă un orologiu floppy<span style="color: white;">.</span><br />
A început vacanţa. Am găsit mecanisme de ceas electromecanic (orologiu cu cuarţ) la „<i>Casa culorilor</i>” din Zalău, aşa că am scos <a href="http://oscilatii.blogspot.com/2018/07/motoare-de-floppy-pentru-ceasuri.html" target="_blank">plăcile cu motoarele trifazate de la vechile unităţi floppy</a> recuperate <a href="http://oscilatii.blogspot.com/2018/07/motoare-de-floppy-pentru-ceasuri.html" target="_blank">anterior</a> şi am făcut noi ceasuri... <a href="http://oscilatii.blogspot.com/2017/07/ceas-de-perete-susan-calvin.html" target="_blank">Susan Calvin</a>.<br />
<br />
Pe una dintre plăci am întălnit o configuraţie neobişnuită, cu 21 de poli (sistem produs în 1995): <br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghxboabTNFltTyLmsHNoGbFRUVoEDIVhhM_YYEVXIjiyxLm96k1p_z9L5YsUSYYZOmlhuHChYzSC3xzXhA3b5U7KSnDoqUWsTLobeSziJLrMkgGwlJBe0WyKcxv5j2XZjuOmYG6HmmuKKL/s1600/orologiu-floppy-1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEghxboabTNFltTyLmsHNoGbFRUVoEDIVhhM_YYEVXIjiyxLm96k1p_z9L5YsUSYYZOmlhuHChYzSC3xzXhA3b5U7KSnDoqUWsTLobeSziJLrMkgGwlJBe0WyKcxv5j2XZjuOmYG6HmmuKKL/s320/orologiu-floppy-1.jpg" width="320" /></a></div>
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Trei lipseau din construcţie, ar fi trebuit să fie 24. Am acoperit 9 cu vopsea verde-închis. A trebuit să pun trei straturi, deoarece bobinajul a absorbit primul strat de parcă ar fi fost lemn uscat. Aşa au rămas 12 poli vizibili, aşa cum trebuie pe un cadran de ceas, la câte 30 grade unul de celălalt.<br />
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Iată rezultatul final:<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj22LqXilYZCc81zhIGDTX2SozQ2Vuf89Y4zzb26COt5B0JiCD4oDeVfAhR8G_5ngSeb5vCF1bWzXiFylcIXdDctBOASiW5eqodfSsmwEtI3xI1UQAF0WegUn3ukCCzlT_PPD0mcEaouGRh/s1600/orologiu-floppy-2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="800" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj22LqXilYZCc81zhIGDTX2SozQ2Vuf89Y4zzb26COt5B0JiCD4oDeVfAhR8G_5ngSeb5vCF1bWzXiFylcIXdDctBOASiW5eqodfSsmwEtI3xI1UQAF0WegUn3ukCCzlT_PPD0mcEaouGRh/s320/orologiu-floppy-2.jpg" width="320" /></a></div>
<span style="color: white;">.</span>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-16806867307469261792018-05-30T05:16:00.000+03:002018-05-31T10:33:12.772+03:00FreeCAD: Monumentul „Tirbuşon”.<br />
Lângă Poşta Veche, acolo unde acum este un bazin cu crăiţe şi salvii, s-a înălţat cândva un monument, o coloană formată dintr-o scară în spirală, terminată cu un cub răsucit, un element arhitectonic pe care l-am reprodus pe calculator:<br />
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Iată o fotografie a originalului:<br />
<a href="http://jibouan.blogspot.com/2010/12/concertul-de-colinde.html">Luna Plină deasupra „Tirbuşonului” de lângă vechea Poştă (decembrie 2010)</a><br />
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El a fost dărâmat în 9 mai 2014, ca să facă loc unei fântâni arteziene muzicale cu spoturi luminoase:<br />
<a href="http://piszkulyka.blogspot.com/2011/05/caderea-tirbusonului.html">http://piszkulyka.blogspot.com/2011/05/caderea-tirbusonului.html</a><br />
Altă fotografie:<br />
<a href="http://oscilatii.blogspot.com/2009/12/o-spirala-luminoasa.html">O spirală luminoasă (decembrie 2009)</a><br /><br />
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<span style="color: white;">.</span>Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0tag:blogger.com,1999:blog-4291682064794892193.post-65966305335804928322018-05-25T12:44:00.000+03:002018-05-25T12:44:13.611+03:00Festivitatea de absolvire a claselor a XII-a<span style="color: white;">.</span><br />
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<br />Waveriderhttp://www.blogger.com/profile/16819654130135361761noreply@blogger.com0