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An engine that operates at half itstheoretical (Carnot) efficiency operates between 525?C and280?C while producing work at the rate of 850 kW. How much heat is wasted per hour?
A 60 g ball is tied to the end of a 50 cm --long string and swung in a vertical circle. how far to the right does the ball hit the ground
Consider a universe in which Einstein's postulates and special relativity are valid but the speed of light c = 200 miles/hour. A Toyota with proper length L and a Bentley with proper length 3L are racing.
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. What is the traction force exerted to the right on the leg
in a typical Van de Graaff linear accelerator, protons are accelerated through a potential difference of 20 MV. What is their kinetic energy if they started from rest
Calculate the density of a bar of gold with a length
David is driving a steady 21.0 when he passes Tina, who is sitting in her car at rest. What is her speed as she passes him
A space vehicle is coasting at a constant velocity of 15.1 m/s in the +y direction relative to a space station. find the direction of the vehicle's velocity relative to the space station
The sound intensity level of a certain sound source is measured by two listeners located at different positions along a line from the source. What is the power output of the source
Assume the ball leaves the table moving horizontally with this speed. If the table is 1 meter above the floor, what is the horizontal distance the ball travels before it hits the floor
A classroom slide projector projects an enlarged (50 times taller) image of a 24mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does the slide projector require to produce a sharply focus i..
Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
Two crates connected by a rope of negligible mass lie on a horizontal surface. Create A has mass mA and crate has mB. calcuate the tension in the rope connecting the block
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