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A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is the net work done on the elevator?
A 4.00-kg box of fruit slides 8.0 m down a ramp, inclined at 30.0 degrees from the horizontal. If the box slides at a constant velocity of 5.00 m/s, what is the work done with the weight of the box?
two racing boats set out from the same dock and speed away at the same constant speed of 86.0 kmh for half an hour
Coherent light of wavelength 525 nm passes during two thin slits that are .0415 mm apart and then falls on a screen 75.0 cm away. How far away from the central bright fringe on the screen is (a) the fifth bright fringe (not counting the central brig..
At the top of a building with a height of 70 m, a ball is thrown vertically upward at time t = 0 with an initial velocity of 12.0 m/s. find the time at which the ball reaches its highest point
the acceleration of a particle is directly proportional to the square time t. when t 0 the particle is at x 24m.
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.00 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellit..
if 61.5 l of oxygen at 18c and an absolute pressure of 2.45 atm are compressed to 48.8l and at the same time the
A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks.
The circuit shown in the drawing is constructed with six identical resistors and an ideal battery. When the resistor R4 isremoved from the circuit, the current in the battery decreases by1.9 A. Determine the resistance of each resistor.
calculate the heat needed at 0 degrees celcius to make the following change of state kilocalories to melt 140 g of
A particle accelerates uniformly from rest to a speed of 50m/s in 10 sec. It then continues its motion at a constant speed for 4 more seconds. all motion for the particle is horizontal(along the x-axis) a) Determine the instantaneous speed of the par..
a worker leaves home at 900 am travels 40 km to the office and then returns home at 500 pm. what is the magnitude of
q1. a evaluate the temperatures of a blue star and a blue jacket coat by using order of magnitude estimates for
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