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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?
The big hill on a roller-coaster ride is 91 m tall. If the mass of the roller-coaster car and its two riders is 314 kg and the maximum velocity reached by this roller-coaster r
With the help of neat & labelled diagram. Explain the principle & working of a moving coil galvanometer. What is importance of radial magnetic field.
What are the applications of Neodymium-Yttrium-Aluminium-Garnet Laser? Applications of Neodymium-Yttrium-Aluminium-Garnet Laser: a. Used into materials processing as like we
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One of the functions of the insulation is hest transfer. Consider an underground cable under operation. This cable is recommended for operations. This cable is recommended for oper
What is the Static Electricity Have you ever had your hair stand on end after rubbing a balloon on your hair before a birthday party? You have probably experienced static e
Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What significant conclusion was drawn from thi
How is magnification in scanning electron microscope controlled? Magnification in scanning electron microscope: Magnification into a SEM (scanning electron microscope) can b
Show the conditions for total internal reflection to happen. Arrive at the relation between refractive index and critical angle. What do you mean by optical fibre? on what rules do
(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.
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