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A ski starts from rest and slides down a 21° incline 120 m long. Use energy methods.
(a) If the coefficient of friction is 0.09, what is the ski's speed at the base of the incline?
(b) If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level?
the cube of insulating material has the one corner at the origen . each side of the cube has length 0.250m so the top face of the cube is parallel to the xz-plane and is at y=.250m, calculated the net charge enclosed by the cube
Assuming you have a detection limit (lowest activity you can measure to a predetermined confidence level) of 20 Bq on you filter measuring system, how much air would you have to sample through your filter to be able to detect the naturally occurri..
When driving along the highway at 62.01 mph my tachometer reads 1,895.90 rpm. If my truck tires at 17.15 inches in radius, what is the ratio of the angular velocity of the tire's rpm's to the engine rpm's?
To a person swimming 0.790m beneath the surface of the water in a swimming pool, what is the actual height of the diving board above the surface of the water
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. find the sound intensity level relative to the threshold of hearing
A 1.1-pF parallel plate capacitor has a potential difference of 12.0 V across it. The plates are 4.5 mm apart, and the space between them contains air. obtain the charge on the capacitor
Two forces parallel to the x axis do 19.0 J of work on a small tray while moving it 17.6 m in the x direction across a gym floor, What is the other force
The Earth is 1.49 x 1011 m from the sun. If the solar radiation at the top of the Earth's atmosphere is 1340 W/m2, compute the total power output of the sun
When a current flows in an aluminum wire of diameter 2.45 mm, the drift speed of the conduction electrons is 1.05 × 10-4 m/s. What is the electron current in the wire
A 0.49 kg block attached to a spring with force constant 150 N/m is free to move on a frictionless, At that instant, find the force on the block
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
Explain how much work is used to raise A to height h? What happens to the kinetic energy of B if its speed is doubled?
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