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Two friends A and B are standing a distance x apartin an open field and wind is blowing from A to B.A beats a drum and B hears the sound t_1 timed after he sees the event. A and B intechange their positions and te experiment is repeated. This time B hears teh drum t_2 time after he sees the event. Calculte teh velocity of sound in still air v and the velocity of wind u. Neglect the tiem light takes in travelling between the friends.
A body does not change its state during the period of time , then it is said to be at __________
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Two friends A and B are standing a distance x apart in an open field and wind is blowing from A to B. A beats a drum and B hears the sound t_1 timed after he sees the event. A and B interchange their positions and the experiment is repeated. The velocity of sound in still air is v and the velocity of wind is u . This time B hears the drum t_2 time after he sees the event. Suppose A and B change their positions in such a way that the line joining them becomes perpendicular to the direction of wind while maintaining the separation x . What will be the time lag B finds between seeing and hearing the drum beating by A?
Air is pumped into an automobile tyre's tube up to pressure pf 200kPa in the morning when the air temperature is 20^(@)C. During the day the temperature rises to 40^(@)C and the tube expand by 2%. Calculate the pressure of the air in the tube at this temperature.
Find the distance travelled by the particle during the time t = 0 to t = 3 second from the figure .
