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An applied force of 875 N (up) acts on a 4.63 kg mass over a displacement of 4.80m (up). Assuming that no friction is involved in this movement, what is the change in kinetic energy of the mass?
Spaceships of the future may be powered by ion-propulsion engines in which ions are ejected from the back of the ship to drive it forward. What is the velocity of the ions relative to the earth
The 1800-turn coil in a dc motor has an area per turn of 1.1 multiply.gif 10-2 m2. compute the current in the coil
Canadian geese migrate essentially along a north-south direction for well over a thousand kilometres in some cases, traveling at speeds up to about 100 km/h. If one such bird is flying at 100 km/h relative to the air, but there is a 30.0km/h wind blo..
A string with a length of 0.7 m is fixed at both ends. What is the longest possible wavelength for the traveling waves that can interfere to form a standing wave on this string
A railroad car of mass 2.52 x10^4 kg, is moving with a speed of 3.94 m/s. It collides and couples with three other coupled railroad cars, each of the equal mass as the single car and moving in the equal direction with an initial speed of 1.97 m/s.
A car of mass 1490 kg rests on a hydraulic lift with a piston of radius 0.26 m that is connected to a second piston of radius 0.031 m. what is the force at the second piston
A cannon with a muzzle speed of 990 m/s is used to start an avalanche on a mountain slope. At what angle, above the horizontal, should the cannon be fired
A life preserver made of Styrofoam is designed to support a person weighing 575 N, Find the volume of Styrofoam required if the body's volume is 0.0503 m^3
A ring is fitted loosely (with no friction) around a long, smooth rod of length L = 0.901 m. Determine the radial velocity of the ring as it reaches the moving end of the rod
q1. a rock is thrown directly upward from the edge of the roof of a building that is 50 m meters tall. the rock misses
A spinning object has a moment of inertia of 1.6 kg*m2. It is rotating at a rate of 1rad/s. If the moment of inertia increases to 3 kg*m2, what is the new rotational velocity
Two large flat planes are separated by a distance d. the plates are connected to a battery. Write an expression for the capacitance
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