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A standing observer perceives a train whistle to have a frequency of 300 Hz. If the train is moving towards the observer at a velocity of 25 m/s, what is the frequency of the sound waves emitted from the train? Assume the speed of sound is 300 m/s.
A circular saw blade rotating at 15 rev/sec is brought to a stop in 125 revolutions. what is the size of the angular acceleration experienced
The acceleration of a bus is given by ax(t)=?t, where ? = 1.26m/s3 is a constant, If the bus's position at time t1 = 1.12s is 6.01m , what is its position at time t2 = 2.13s
A car is safely negotiating an unbanked circular turn at a speed of 29 m/s. The road is dry, and the maximum static frictional force acts on the tires, what speed must the driver slow the car
You have decided to make a large cooler to store meat. Calculate the net rate of heat flow per second out of the cooler if the interior temperature is 5 C and the exterior temperature can be 45 C
A copper wire is 10.00 m long and has a cross-sectional area of 1.00 x10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to the battery that applies a potential difference of 0.200 V.
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
A charged particle moves through a velocity selector at a constant speed in a straight line, Calculate the charge-to-mass ratio of the particle.
A handball of mass 0.10 kg, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19m/s. What is the change in the momentum of the ball.
The minimum stopping distance for a car traveling at a speed of 30 {m/s} is 60 {m}, including the distance traveled during the driver's reaction time of 0.50 {s}.What is the least stopping distance for the same car traveling at a speed of 41 {m/s}..
If the rocket gases are expelled at a speed of 2010 m/s, explain how much mass must be expelled?
An iguana that is slowing down at a uniform rate of acceleration while moving in positive direction.
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 800 N, How far did he slide down the pole
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