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Q. If an object isn't moving, no external force acts on it.
No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example: Sitting on a chair, the chair pushes up on you while gravity pulls you down, but you aren't going anywhere because those forces cancel each oyher and net force is equal to zero.
The length of a simple pendulum is about 100cm known to have a accuracy of 1mm.Its period of oscillation is 2s determined by measuring the time for 100oscillations using a clock of
It consists of two semis circular plates. One is of quartz and other is glass plate joined together along the diameter. The quartz semi circular plate is a half wave plate whose
At what temperature would the average speed of helium atoms equal (a)the escape speed from Earth, 1.12 ´ 10 4 m/s, and (b) the escape speed from the Moon, 2.37´ 10 3 m/s? (See Ch
For a parallel-plate capacitor with plate area "A" and plate separation "d", the capacitance is proportional to which of the following? a) A divided by d squared b) A tim
Describe the Michelson Morley's experiment and explain its negative result. What is "Length Contraction" and "Time Dilation" in relativistic mechanics? Explain.
concave grating and rowland''s mounting theory
working model needed.........please help!!!!!!!!!!!!
dawda
explain fresenl''of optical rotations theory
A train consists of a 4300-kg locomotive pulling two loaded boxcars. The first boxcar has a mass of 12,700 kg and the second has a mass of 16,300 kg. Presume that the boxcar wheels
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