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An echo is easily the retransmission of speaker's own voice caused by reflection at a distance surface.
If there is a sound reflector at a distance d from host, then the time interval among original source and it's echo at the site of source will be
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) W
What are the properties of ultrasonic waves? Properties of Ultrasonic Waves are as follows: a. Ultrasonic waves are acquiring frequencies higher than20 KHz and therefore th
what is friction force? why does opposes the motion?
Two circular coils, one of radius r and the other of radius R are placed coaxially with their centres coinciding. For R >> r, get an expression for the mutual inductance of the arr
A bar has a 20N weight at one end. You have a weight of 15N to hang somewhere on the bar so that the bar is in equilibrium. Where would you hang the 15 N weight on each of these ba
what is expansion of solids
In Young's double slit experiment, deduce the conditions for (i) constructive, and (ii) destructive interference at a point on the screen. Draw a graph showing variation of the res
what is main requirements for any thin film process
When royce was 10 years old he had a mass of 30kg by the time he was 16 years old his mass increase to 60kg how much larger is the gravitational force between royce and earth at a
working principle of vibration and deflection magnetometer?
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