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Question1
Two train whistles have an identical frequency of 157 Hz. Train A is motionless in the station and sounds its whistle.
Meanwhile Train B is pulling into the station and sounds its whistle. The conductor of Train B hears 3.70 beats every second.
How fast is Train B moving? The speed of sound is 340. m/s.
Question2
Two small non conducting spheres have a total charge of 91.0.while placed 1.19 apart, the force each exerts on the other is 10.5 and is repulsive. What is the charge on each? What if the force were attractive?
A .32 caliber bullet fired from a revolver with a 3 in long barrel will have a relatively low muzzle speed of about 200 m/s. how fast will it be moving when it returns
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A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.59 x 104 m/s, What is the orbital speed of the second satellite
A wheel is rotating about an axis that is in the z-direction. The angular velocity is w = ?6.00 rad/s at t = 0, What is the angular displacement (change in angle) of the wheel at t = 7.00s
0.0029 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2 and are 1.5 mm apart
On a dry day, just after washing your hair to remove natural oils and drying it thoroughly, run a plastic comb through it. Small bits of paper will be attracted to the comb. Explain why.
a stell ball of mass m suspended by a thread of lenght l. the ball is then released when the thread is horizontal. at the bottom of this path, find the speed of the block just after collision
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