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Cathode rays are made up of:
(1) Positively charged particles
(2) Negatively charged particles
(3) Neutral particles
(4) None of these
Ans: (2)Negatively charged particles
When a driver brakes an automobile, the friction between the brake drums and the brake shoes converts the car's kinetic energy to thermal energy. If a 1450 kg automobile traveling
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Write down the condition for dispersion without deviation. Describe power of a lens. What do you mean by magnification?
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what is matter
Q. Why does the sky appear blue in colour? As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look o
Reducing friction by an air stream Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue
Discucc em spectrum
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