Physics The cover of a solar cooker is made of glass because It rediates heat better than metals It absorbs sun's rays It retains the heat inside by the green house effect It reflects sun's rays It rediates heat better than metals It absorbs sun's rays It retains the heat inside by the green house effect It reflects sun's rays ANSWER DOWNLOAD EXAMIANS APP
Physics What is the minimum escape velocity of rocket to be launched into space ? 15 Km/Sec. 11 Km/Sec. 5 Km/Sec. 6 Km/Sec. 15 Km/Sec. 11 Km/Sec. 5 Km/Sec. 6 Km/Sec. ANSWER DOWNLOAD EXAMIANS APP
Physics A small gap is left at the joints of rails in a railway track to Avoid the tracks being distorted due to seasonal temperature variation Control the speed of train Keep the rails equidistant Avoid the heating of tracks to high temperature Avoid the tracks being distorted due to seasonal temperature variation Control the speed of train Keep the rails equidistant Avoid the heating of tracks to high temperature ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum? Bunsen and Kirchhoff's experiment Lamb-Rutherford experiment Geiger and Marsdens experiment on scattering of alpha particles Barkla's experiment on scattering of X-rays Bunsen and Kirchhoff's experiment Lamb-Rutherford experiment Geiger and Marsdens experiment on scattering of alpha particles Barkla's experiment on scattering of X-rays ANSWER DOWNLOAD EXAMIANS APP
Physics The scientist who first sent electromagnetic waves to distant places is John Logie Baird Thomas Alva Edison Heinrich Hertz James Clerk Maxwell John Logie Baird Thomas Alva Edison Heinrich Hertz James Clerk Maxwell ANSWER DOWNLOAD EXAMIANS APP
Physics If ice floating on water in a vessel melts, the water level in the vessel ________ . First increases before decreasing Decreases Does not change Increases First increases before decreasing Decreases Does not change Increases ANSWER DOWNLOAD EXAMIANS APP
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