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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?
Q. In the given circuit, calculate the potential differences across each resistor Solution : i) R s = R 1 + R 2 + R 3 = 10Ω ii) Current in circuit I = V/R s
A 2350-kg granite tombstone absorbs 2.8 x 107 J of energy from the Sun to change its temperature from 5.0°C at night to 20.0°C during an autumn day.
A Newton is equal to which of the following? a) kilogram-meter per second b) meter per second squared c) Kilogram-meter per second squared d) Kilogram per
I need help with this project ? every time I would turn on my lab work I would get bad grades, and science is my weakest subject
"At base temperature the volume of a gas differs inversely with pressure". If P and V are volume and pressure of a gas at a given temperature then
The screw is an inclined plane Mark off and cut out a right angle triangle on a piece of white paper or a piece of wrapping paper. The triangle should be about 30 cm long on it
(1) In Boolean algebra only two types of state variables (0 and 1) are permitted. (2) The variables (A, B, C ....) of Boolean algebra are subjected to three operations.
An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be : (1) 26 (2) 30 (3) 36 (
working and construction of interferometer
a picture frame is hanging by two verticle strings the tention in the string are 3.8N and 4.4N find the weight of the picture frame
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