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What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water?
In a Rotor-Ride at a carnival, riders are pressed against the inside wall of a vertical cylinder 2.00 m in radius rotating 1.10 revolutions per second when the floor drops out. What is the speed of a rider in m/s
pam wearing a rocket pack stands on frictionless ice. she has a mass of 41 kg. the rocket supplies a constant force for
A car proceeding due south at 60 km/h (V1) makes a right turn,after which it is traveling due west at 80 km/h (V2). What is its change in velocity (V2-V1)? and draw it
A 40-N crate rests on a rough horizontal floor. A 12- N horizontal force is then applied to it. find the magnitude of the frictional force on the crate
In a high magnetic field experiment, a conducting bar carrying 13.5 kA passes through a 30 centimeter long region containing a 24.0 T magnetic field. compute what force is necessary to hold it in place
A 1.1 kg hollow ball with a radius of0.12 m, filled with air, is releasedfrom rest at the bottom of a 1.9 mdeep pool of water. How high above the water does the ball shoot upward
After sliding on a rough, horizontal surface, a 25.0-kg rock initially going 8.5 m/s eventually stops due to friction. What average power is produced by friction as the rock stops
A particle has an acceleration of 6.19 m/s^2 for 0.350 s. What was the particle's initial velocity
q1. a ranger in a national park is driving at 52 kmh when a deer jumps onto the road 86 m ahead of the vehicle. after a
The angular velocity of the rotor changes from ω0=300rad/s to ω1=150 rad/s'> in a time interval Δt1=2.0 minute'> as the rotor slows to rest at constant acceleration. Find how many revolutions do the blades make in coming to rest from the initial ve..
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
A typical ten-pound car wheel has a moment of inertia of about. The wheel rotates about the axle at a constant angular speed making 60 full revolutions in a time interval of 5.
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