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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.
Q. Illustrate how do you compute shaft power? Answer:- Shaft power P = (2(pi) * (angular Speed in rpm) * (Torque at shaft))/ 60 Torque of a solid shaft is specified by
For a blackbody, the frequency at which maximum energy is emitted is 3 x 10 13 Hz: A. Give a wavenumber for the wavelength of the infrared emission? B. What is the tempe
Energy gap: 1.4ev at room temperature Its charactistics are very closely related to those of germanium. This is under stable, since Gallium is the third column neighbour and a
How many significant digits are there in each of the following measurements? a. 100 m 1 b. 0.0023 m/s 2 c. 100.1 m 4 d. 2.0023 5
Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: a) red light is focused more strongly than blue light b)
Do fibers have losses? Everything in the universe is inefficient. It means that while a measured amount of something enters in a system, less comes out than initially went in.
one coin is thrown upword from 100m top building with velocity 15m/s .2s later 2nd coin is dropped downword at what distance from top of building 2nd coin cross first? Ans) They
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
how much time is required to raise the temperature of the water from A family comes home from a long vacation with laundry to-do and showers to take. The water heater has been t
There is a point between the Earth and the Moon where the gravitational effects of the two bodies balance each other. Calculate the distance from the center of the Earth to this po
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