Physics In Astrophysics, what name is given to a hypothetical hole in outer space from which stars and energy emerge? Asteroid belt Black hole White hole Ozone hole Asteroid belt Black hole White hole Ozone hole ANSWER DOWNLOAD EXAMIANS APP
Physics A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct? Both the photons have different energies. The speeds of both the photons in vacuum are different The wavelength of X-ray photon is less than the wavelength of visible radiation photon. The frequency of X-ray photon is higher than the frequency of visible radiation photon. Both the photons have different energies. The speeds of both the photons in vacuum are different The wavelength of X-ray photon is less than the wavelength of visible radiation photon. The frequency of X-ray photon is higher than the frequency of visible radiation photon. ANSWER DOWNLOAD EXAMIANS APP
Physics When a person sitting on a swing stands up on the swing, the frequency of oscillation Does not change Becomes infinite Increases Decreases Does not change Becomes infinite Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Physics When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as Doppler effect Beats Resonance Echo Doppler effect Beats Resonance Echo ANSWER DOWNLOAD EXAMIANS APP
Physics Hydro-electric power is a: A mixture of renewable and non-renewable natural resource non-renewable natural resource Neither renewable nor non renewable resource Renewable natural resource A mixture of renewable and non-renewable natural resource non-renewable natural resource Neither renewable nor non renewable resource Renewable natural resource ANSWER DOWNLOAD EXAMIANS APP
Physics Which tube used to produce X-ray? Roentgen Coolidge tube X-ray tube None of these Roentgen Coolidge tube X-ray tube None of these ANSWER DOWNLOAD EXAMIANS APP
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