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why velocities of x rays and gamma rays are same inspite they have different wavelengths and frequencies
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both x-rays and gamma radiations are electromagnetic waves and all electromagnetic waves have same speed in vacuume.
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The system shown in the figure is in equilibrium. The metal spheres are identical and each has a mass of 2 kg. The surface areas of the pistons are equal and 100 square centimeters each. The density of water is 1 g per cubic centimeter. Assuming that the frictions and masses of the pistons are negligible, what is the mass of G? ( g = 10N/kg )
Distinguish between optical and acoustic resonance.
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General Physics 
