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An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the x-axis, the second is 75 N along the y-axis. What is the direction of the third force, measured counterclockwise from the x- axis?
A 1.2 kg brick is held a distance of 2 m above a manhole and then dropped. What is the change in potential energy
In a head-on collison with an atom, a fast-moving electron suffers a deceleration of 4.0x10^23 m/s^2. What is the electric radiation field generated by the electron at a distance of 10 cm at right angles to the direction of motion
What is the potential difference measured by voltmeter
On a nice winter day at the South Pole, the temperature rises to ?63°F. What is the approximate temperature in degrees Celsius
as two trains move along a track their conductors suddenly notice that they are headed toward each other. the figure
basketball star covers 2.85 m horizontally in a jump to dunk the ball. His motion through space can be modeled precisely as that of a particle at his center of mass. Determine his takeoff angle
Assuming you can't use the electric heater, you put 0.2kg of water at 20(C) in a thermous. If you move the water up and down a height 10cm twice/second, how long must you shake the water to raise the temperature to 100(C)?
A 50 kg crate slides down a ramp that is inclined by 30 degrees from the horizontal. Calculate the amount of energy lost by the crate due to friction in its journey down the ramp
A proton of charge +1.60Ã-10-19 C and mass 1.67Ã-10-27 kg is introduced into a region of B = 0.149 T, What is the radius of the proton's path
Two loudspeakers emit 400Hz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck, What is the truck's speed in m/s
Dave Johnson, the bronze medalist at the 1992 Olympic decathlon in Barcelona, How far does his center of mass move up as he makes the jump
A weight lifter lifts a 360-N set of weights from ground level to a position over his head, a vertical distance of 2.05 m. How much work does the weight lifter do
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