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A person with perfect pitch sits on a bus bench listening to the 438 Hz horn of an approaching car. If the person detects a frequency of 475 Hz, how fast is the car moving?
m/s
Forensic scientists can measure the muzzle velocity of a gun by firing a bullet horizontally into a large hanging block that absorbs the bullet and swings upward. What was the original speed of this bullet
A bicycle wheel has a diameter of 64.1 cm and a mass of 1.81 kg. suppose that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 120 N is applied tangent..
questiona 5kg block at first has a speed of 1.5ms at the top of a 30?nbspincline and slides a distance of 5.0m down
When a battery is connected to a 100.0-? resistor, the current is 4.00 A. When the same battery is connected to a 400.0-? Find the emf supplied by the battery
A large air-filled 0.247-kg plastic ball is thrown up into the air with an initial speed of 11.3 m/s. What fraction of its original energy has been lost to air friction
A 0.329-kg volleyball approaches a player horizontally with a speed of 12.9 m/s. What impulse is delivered to the ball by the player
A green ball is thrown vertically downward to the ground with an initial speed of 5m/s, at time t = 0, from a vertical height of 100m above the ground. find the magnitude and direction of velocity of the red ball
A sports car traveling along a straight line increases its speed from 20.4 mi/h to 60.4 mi/h. What is the ratio of the final to the initial kinetic energy
Suppose the image of an object is upright and magnified 1.69 times when the object is placed 14cm from a lens
A box with a mass of 6 kg is lifted (without acceleration) by a height of 6.0 m in order to place it upon the shelf of a closet.
A photon undergoing Compton scattering has an energy afterscattering of 800 keV, and the electron recoils with an energy of 200keV
question1a man pushes a lawn mower on a level lawn with the force of 200n it 40 percent of this force is directed
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