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A power boat heads due northwest at 13m/s relative to the water across a river that flows due north at 5m/s. What is the velocity (both magnitude and direction) of the motorboat relative to the shore?
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.76 m. Where should the third charge be located
An ore car of mass 4 000kg rolls downhill on tracks from a mine. At the end of the tracks, 10 m lower in elevation, is a spring with k = 400 000 N/m. How much is spring compressed in stopping the ore car? Ignore friction.
A light spring-gun projectile launcher is mounted on an 0.533 kg air track glider. What is the speed of the air-track glider after the gun is fired
A block rests on a spring and oscillates with a frequency of 4Hz and an amplitude of 7cm. What is the speed of the bead at the instant when it loses contact with the block
A 12 volt battery powers a circuit that consists of a ten ohm resistor in series with a ten ohm and a 15 ohm that are in parallel. How much current flows through the 15 ohm resistor
What will the force be between these charges. What should the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction.
A scuba tank has a volume of cm2. For every deep dives, the tank is filled with (by volume) pure oxygen and 50% pure helium. What is the ratio of the rms speeds of the two types of molecules
When a 21 ohm resistor is connected to a battery that has a 7 ohm internal resistance the terminal voltage of the battery is 9 V. Determine the emf of the battery
A point charge of 20nC is placed on the x-axis at the point x = 2. Find the x-component of the electric field Ex at x = 4 and x = -1 where the coordinates are in meters
Consider a refridgerator in a standard home, where the temperatures are 22 degrees Celsius in the home and the refridgerator is kept slightly above freezing, what is the total change of entropy for the problem
A 45 g golf ball is pushed up a 30° ramp. The ball starts from rest and the length of the surface of the ramp is 5 m. What was the magnitude of the pushing force
q1. a krypton laser produces the cylindrical red laser beam 2.0mm in diameter with 2.0w of power. what is the light
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