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A commuter train blows its horn as it passes a passenger platform at a constant speed of 40.0m/s. The train horn sounds at a frequency of 305 Hz when the train is at rest.
(a) What is the frequency observed by a person on the platform as the train approaches? (b) What is the frequency observed by a person on the platform as the train recedes from him? (c) What wavelength does the observer find in each case?
A 2400-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6.67x10 3 m/s. What is the acceleration of the satellite? Determine the m
Selection of motors for different Engg. application 1. For Cement industry: Various types of motors for pumps, fans, conveyors ,crushers, kilns an mills Major mill
prove - w2=w0+2alpha(thita-thita0)
(a) Explain the terms: 'magnetic field strength', 'magnetic flux density' and 'permeability' of a magnetic material. Write their SI units. A current carrying conductor is placed
The velocity with which the group of waves travels is called as group velocity or the velocity with which a ray packet goes is called as group velocity
One source of a star's energy is the fusion of two deuterons to form an alpha particle plus a gamma ray. a. Write down the nuclear equation for this fusion. b. Measure the m
A solar cell or photo voltaic cell is a semiconductor device that converts photons from the sun into electricity. It can also be defined as a semiconductor electrical junction appa
why is friction necessary
THE MAGNETIC CIRCUIT In an electric circuit, a current is established due to the existence of an electromotive force. In the same way, in a magnetic circuit, a flux is establis
If the speed of light were smaller than it is, would relativistic phenomena be more or less conspicuous than they are now? All else being similar, involving the rates of the ch
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