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A simple ideal pulley system has a mechanical advantage of 14. How much force is required to lift a boulder of with a weight of 5,270 Newton?
Answer in Newtons.
A radiometer has two square vanes (each measuring 1.0 cm by 1.0 cm), attached to a light horizontal cross arm, find the electromagnetic power absorbed by the blackened vane
Ultrasound reflected from an oncoming bloodstream that is moving at 22.0 cm/s is mixed with the original frequency of 3.00 MHz to produce beats
Find the maximum rms current allowed in the primary circuit.
A 34.0-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 225 N. What is the final speed of the crate after being pulled these 21.0 m
When a body of mass m is moving with a speed v, it has kinetic energy associated with its motion. by what percentage does the kinetic energy increase
At the instant of the figure, a 5.80 kg particle P has a position vector of magnitude 5.40 m and angle ?1 = 50.0° and a velocity vector of magnitude 1.10 m/s and angle ?2 = 30.0°. what are the magnitude of the torque acting on the particle
Two astronauts, initially at rest in space, push on each other. what average force does each astronaut exert on the other
A wrench is thrown at a speed of 69 mph at a wall that is 70 ft away. How much force does the wall exert on the wrench and in what direction
A biology student uses a simple magnifier to examine the structural features of an insect's wing. The wing is held 3.60 cm in front of the lens, What angular magnification is achieved
Consider a capacitor created when two identical conducting plates are placed parallel and close to each in other in vacuum, what is the magnitude of the electrostatic force between the charged plates, Is the force attractive or repulsive
A 53.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 130 kg football players at a height of 1.30m. what is the diameter of the football players' piston
Tall Pacific Coast redwood trees (Sequoia sempervirens) can reach heights of about 106 . If air drag is negligibly small, how fast is a sequoia cone moving when it reaches the ground
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