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A building with a weight of 5.200e+7 N is built on a concrete foundation with an area of 1300 m2 and an (uncompressed) height of 2.82 m. By what vertical distance does the foundation compress?
In each cycle of its operation, a refrigerator removes 10 J of heat from the inside of the refrigerator and releases 38 J of heat into the room. How much work per cycle is needed to operate this refrigerator.
Consider a collision between an alpha particle (mass 4 amu) and an initially stationary oxygen nucleus (mass 16 amu). What was the initial speed of the alpha particle
A cannon tilted up at a 25 degree angle fires a cannon ball at 81.0m/s from atop a 18.0m -high fortress wall
An instructor wants to use a lens to project the real image of a light bulb onto a screen 1.23 m from the bulb. In order to get the image to be two times as large as bulb, what focal length lens will be required.
a 4500 kg helicopter accelerates upward at 2.0m/s^2. what lift force is exerted by the air on the propellers
Abolt comes loose from underneath an elevator that is moving upward at a speed of 6.1 m/s. what is the speed of the bolt when it hits the bottom of the shaft
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers.
how long does it take for a person to radiate. Calculate the time of flight.
Two 10-cm-diameter charged rings face each other, What is the electric field at the center of the left ring
The concepts for finding the change in length of a rod.
0.97 L of 16C water is placed in a refrigerator. What is the refrigerator's coefficient of performance
A 1.5kg block intially at rest at the top of a 3m incline with a slope of 30degrees begins to slide down the incline. How fast is the block moving midway along the inlcine
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