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Q1. An ambulance travelling at 39 m/s approaches a car heading in the same direction at a speed of 19 m/s. The ambulance driver has a siren sounding at 540 Hz. At what frequency does the driver of the car hear the siren? (Imagine a temperature of 20° C.)
Q2. A string of 13 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 63 W.
What is the comparable resistance of light string?
What is weight of the parachutist
Find out the tension in the rope
Find out the tension of the right and left wire
What is the kinetic energy
What is direction of the velocity of the canoe
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
How far above the aim is the point
A dockworker applies a constant horizontal force of 84.0\({\rm N}\) to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5\({\rm m}\) in a time 4.80\({\rm s}\)
An average force of 201 N is exerted to draw the string back 1.3 m. unless otherwise directed, imagine that air resistance is negligible. Illustrate energy bar graphs to solve the difficulty .
Sketch a principle ray diagram showing the formation of the image. compute the position, size, orientation (erect or inverted), and nature (real or virtual) of the image.
What is the change in kinetic energy of the puck
How to find the position and height of an image
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