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why gravitational energy for a system of particles is found by first finding the gravitational energy between individual particles and then adding it up?
Ans) It is a scalar quantity.Basic laws of physics state that we can directly add or subtract scalar quantities.If you put a mass of 10 kgs on a mass of 20 kgs, the total mass is 30 kgs.We add up, because mass is a scalar quantity.So is PE.
A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s, and then at constant velocity for the remaining time, what was his average veloci
Consider the sketch of the electromagnet in the figure below. Which components could you change to increase or reduces the strength of the electromagnet? Describe your answer.
Iron is what type of magnetic material? Is it: a) Diamagnetic b) Paramagnetic c) Ferromagnetic d) Non-magnetic Ans: Iron is ferromagnetic type of m
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Briefly explain how the wavelength of monochromatic light is calculated using Newton's rings arrangement?
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Q. The kinetic energy of an electron 120 eV. Compute the de Broglie wavelength of electron. λ = h / √2mE λ = 6.626 X 10 -34 / √ 2 X 9.1 X 10 -31 X 120 X 1.6 X 10 -19
Fibre optics: Light travels in straight lines, even though lenses and mirrors can deflect it, light still travels in a straight line between optical devices. This is fine for
Reflection and Refraction Describing reflection and refraction, involving total internal reflection. You might drag the control at the top to modify the angle of incidence and
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