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A slingshot fires a pebble from the top of a building at a speed of 5.0 m/s. The building is 20.0 m tall. Ignoring air resistance,
1. Discover the speed with which the pebble strikes the ground when the pebble is fired horizontally.
2. Discover the speed with which the pebble strikes the ground when the pebble is fired vertically straight up.
the current in a 120 v reading lamp is 3.0 a part a if the cost of electrical energy is 0.075 per kilowatt-hour how
The free-fall acceleration on the surface of Mars is about three eighths that on the surface of the Earth. Find the ratio of their average densities, ?Mars/?Earth
for each of the motions described below determine the algebraic sign - or 0 of the velocity and acceleration of the
A lens in Lick Observatory's 36-inch refracting telescope has a thickness of 1.96 inches at its center and an index of refraction n=1.52. What is the light speed in the lens
A 3500 resistor and a 1.7 µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms)
Consider Joule's experiment described in the insight below. Assume the mass m = 2.2 kg and the fluid is water with a volume of 0.75 L. What is the increase in the temperature of the water
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How much charge moves during this time
Which one of the following choices represents the largest kinetic energy? While you sleep, your body is using energy at a rate of 77W. How many food calories are used through an eight hour period? One food calorie (C) is equal to 4186 joules.
A 0.150kg toy is undergoing SHM on the end of a horizontalspring with a force constant 300 N/m. estimate the maximum speed attained by the object duringits motion
A glass window pane in a home is 0.62 cm thick and has dimensions of1.0 m 1.9 m. Find how much energy is lost during the window in one day, assuming the temperatures outside and inside remain fix
A child and sled with a combined mass of 50.6 kg slide down a frictionless hill that is 8.72 m high. If the sled starts from rest, what is its speed at the bottom of the hill
question a light stick with two masses attached to it is spinning about its center at 5 revolutions per minute. the
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