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A soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. If the player hears the sound of the splash 2.78 s later, what was the initial speed given to the rock? Assume the speed of sound in air is 343 m/s
Illustrate what was its angular acceleration (assumed constant) and what was its final angular speed in rpm?
Consider a tungsten filament in a light bulb. After the bulb has been on for an hour, how has the resistance in filament changed (if at all).
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 9 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the vacuum cleaner.
suppose that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand.
A 0.07 kg bullet traveling at 602 m/s hits a 7.3 kg block of wood and stays in the wood. What is the velocity (speed)of the wood block
The car's motion can be divided into three different stages: its motion before the driver realizes he's late, its motion after the driver hits the gas (but before he sees the police car), and its motion after the driver sees the police car. Which of ..
From what height did the student fall? Assume that the only force acting on him throughout the collision is that as a result of the ground.
what is the entropy change during the free expansion of 1.70 moles of an ideal gas from an intial volume of 1.60 liters into an evacuated volume of 1.90 additional liters
A 24-V battery is connected in series with a resistor and an inductor, Find the energy stored in the inductor when the current reaches its maximum value
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 3.0 in. of rain in 30 min on a town of area 30 km2. What vo..
Two spherical balls have volumes in the ratio of 27:1. What is the ratio of their surface areas
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like the merry-go-round. At first the cockroach and disk rotate together with an angular velocity of 0.220 rad/s. Then the cockroach walks ..
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