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Question: An ambulance has a siren of frequency 700 Hz. If the ambulance is moving at a speed of 60 miles per hour, what will be the frequency heard by a man standing on the sidewalk as the ambulance approaches him?
A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure.
A lead bullet with a mass of 0.02 kg traveling at 209 m/s strikes an armor plate and comes to a stop. what is the temperature change
The train comes to a stop 6m from the point at which it was released. What is the magnitude of train's acceleration after its wheel begins to stick.
A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. This causes the machine to slide backward 1.122 meters before coming to a rest. What surfaces are likely to cause this friction
A small body of mass 0.28 kg is undergoing simple harmonic motion of amplitude 4.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?
Block A has mass 1.20 kg and Block B has mass 2.9 kg. They are forced together, compressing spring S between them how much potential energy was stored in the compressed spring
An unspecified force causes a 0.2-kg object to accelerate at 0.4 m/s2. find the acceleration (in m/s2) of the heavier object
The electric field everywhere on the surface of a charged sphere of radius 0.170 m has a magnitude of 590 N/C, What is the net charge on the sphere
Which one of the following statements concerning standing soundwaves is FALSE? For a tube open at one end only, standing waves of oddharmonics are the only ones present.
The force vector A has a magnitude of 98.0 newtons (N) and points due east. The force vector B has a magnitude of 111 N and points 71.1 ° north of east. Find the (a) magnitude and (b) direction of A - B. (Give the direction as a positive angle with r..
A model airplane with mass 0.757 kg is tethered to the ground by a wire so that it flies in a horizontal circle 29.7 m in radius. The airplane engine provides a net thrust of 0.798 N perpendicular to the tethering wire.
question anbsp skier of mass 70kg is pulled up a slope by a motor driven cable. how much work is required to pull him
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