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Postulates of Special Theory of Relativity-
1. All law of physics having same form in all inertial frame of reference.
2. The speed of light in free space is constant, irrespective of source, observer and direction in all inertial frames.
A block of metal which weighs 60 newtons in air and 40 newtons under water has a density, in kilograms per meter cubed, of: a) 1000 b) 3000 c) 5000 d) 7000
For the circuits shown in Figure the resistors show the internal resistance of the batteries. Find, in each case: (i) The total e.m.f. across PQ (ii) The total equivalent in
A 1200-kg cannon is placed at rest on an ice rink. A 95.0-kg cannonball is shot from the cannon. If the cannon recoils at a speed of 6.80 m/s. What is the speed of the canno
The mass of 1 mole of electrons is: (1) 9.1x 10 -28 g (2) 1.008mg (3) 0.55mg (4) 9.1x 10 -27 g Ans: (3)0.55mg
Draw a picture of the heat engine in a typical fossil fuel power plant and explain how it works. 1. ___________ is a measure of the electrical potential energy per free ele
how Michelson interferometer can be used to measure the wavelength of sodium light.
Image Formation for Plane Mirrors Not all people who are performance the object within the mirror will sight along the similar geometrical line of sight. The precise direction
Ask An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 490 kg and a maximum acceleration of 2.24 m/s2 . Engineering safety sta
Q. Illustrate what is larger the force the earth exerts on you or the force you exert on the earth? Answer:- A non-scientist's preliminary stab at this If you are talking
Q. Give three applications of photoelectric cells. (i) Photoelectric cells are utilized for reproducing sound in cinematography. (ii) They are utilized for controlling the
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