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It takes 25 turns to drive a screw completely into a block of wood. Because the friction force between the wood and the screw is proportional to the contact area between the wood and the screw, the torque required for turning the screw increases linearly with the depth that the screw has penetrated into the wood. If the maximum torque is 15 N m when the screw is completely in the wood, what is the total work (in J) required to drive in the screw?
A 291-kg motorcycle is accelerating up along a ramp that is inclined 30.1° above the horizontal. Find the magnitude of the motorcycle's acceleration
A catcher stops a ball traveling at 28.0 m/s in a distance of 55.30 cm and feels a force of 313 N against his glove. What is the mass of the ball.
By what fraction does your mass increase when you and your car travel down the highway at 70 mph
13 cars in a circle at a boom box competition produce a 110 dB sound level at the center of the circle. What is the average sound level produced there by each
what is the decrease in entropy of 25.0g of water that condenses on a bathroom mirror at 35C assuming no change in temp and given the latent heat of vap to be 2450KJ/KG
A 1000kg sports car accelerates from 0m/s to 33m/s in 13s. What is the average power of the engine
A 66-kg man standing on a scale in an elevator notes that as the elevator rises, What is the acceleration of the elevator
A starship voyages to a distant planet 10 ly away. The explorers stay 4.00yr , return at the same speed, What is the speed of the starship
questionan ideal gas undergoes this methodin a p v diagram point 1 starts at v1p1 moves to v1 p2 then to v2p2 then v2p1
pivot without friction about the point O. This pendulum is released from rest in a horizontal position, How far does the block move before coming to rest
Two loudspeakers emit sound waves along the x-axis. What is the phase difference between the speakers
A light ray in the core (n = 1.32) of a cylindrical optical fiber (the figure below) travels at an angle ?1 = 45.9° with respect to the axis of the fiber. What angle ?2 does the exiting ray make with the outside surface of the cladding
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