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A 7800 kg boxcar traveling at 18.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 7.5 m/s. What is the mass of the second car?
An objects angular momentum changes by 10 kgm^2/s in 2.0 s. What magnitude average torgue acted on this object
a solenoid is designed to store Ul = 0.10 J of energy when it carries a current I of 450 mA. How many turns of wire must the solenoid have
A 117 kg fullback runs at the line of scrimmage. How fast was he running initially
A golf ball of mass 0.047 kg is hit off the tee at a speed of 40.2 m/s. The golf club was in contact with the ball for 3.29E-3 s. Find the impulse imparted to the golf ball
A long pair of wires conducts 28.10 A of dc current to, and from, an instrument. If insulated wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field d = 11.2 cm from their midpoint, in their plane.
A flash light is at the bottom of a 2m deep pool. Find the critical angle of incidence for the light that is trapped or reflected back
A uniform steel beam has a mass of 720kg On it is resting half of an identical beam, What is the vertical support force at each end
A ball having a mass of 2 kilograms, starting at ground level, is shot straight up into the air. What is the ball's Total Energy at these same three points in its flight
A point charge Q is trapped at the center of a thin-walled hollow conductive sphere of radius R, How much charge will collect on the inside surface of the hollow sphere
A high-speed lifting mechanism supports a 880-kg object with a steel cable that is 39.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
The magnetic field produced by an MRI solenoid 2.7m long and 1.7m in diameter is 1.9T. Find the magnitude of the magnetic flux through the core of this solenoid
Calculate the force of gravity on a spacecraft 25600 km (4 earth radii) above the Earth's surface if its mass is 1500 kg
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