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A long distance runner starts at given place and runs around a circular track of 63m radius at a speed of 6.0m/s in the clockwise (positive) direction for 60 seconds. Then the runner reverses direction and runs in the counterclockwise (negative) direcetion at 4 m/s for 120 s. At then end, how far around the track is the runner from the starting point?
A suitcase weighing 228N is at rest on the floor of a hotel lobby. The co-efficient of static friction between the suitcase and the floor is 0.49, and the coefficient of kinetic friction is 0.313. With what least amount horizontal force must a bel..
A 94.00 water skier floating in a lake is pulled from rest to a speed of 10 in a distance of 24. What is the net force exerted on the skier, assuming his acceleration is constant.
Suppose you walk into a sauna that has an ambient temperature of 50.0 C. Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0 C
while a system is taken from state a to state b in the figure below the path acb, 84.0 of heat flows into the system and 57.0 of work is done by the system.
When light of a certain waveleght is incident normally on a certain diffraction grating the line of order 1 ia at a diffraction angle 25 Degrees
In a car lift, the output plunger has a radius of 9cm. the weight of the plunger and the car is 21600N. What is the gauge pressure of the hydraulic oil used in the operating lift.
Find tension in the back muscle and the compressional force
One swimmer in a relay race has a 0.49 s lead and is swimming at a constant speed of 3.97 m/s. the swimmer has 57.7 m to swim before reaching the end of the pool
By measuring the spectrum of wavelengths of light from our sun, we know that its surface temperature is 5760 K . By measuring the rate at which we receive its energy on earth, we know that it is radiating a total of 3.93×1026 J/s and behaves nearl..
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 28 m.
What are memory tricks, and explain in theoretical terms why they work?
At 100 °C the rms speed of nitrogen molecules is 576 m/s. Estimate the rate of molecular collisions (collisions/s) on this wall
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