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A skier starts from rest at the top of a hill. The skier coastsdown the hill and up a second hill, as the drawing illustrates. Thecrest of the second hill is circular, with a radius of 31.5 m.Neglect friction and air resistance. What must be the height h of the first hill so that the skierjust loses contact with the snow at the crest of the second hill?
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. after that an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its unique value. What is the final temperature.
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
Assume we have an infinitely long wire carrying a current of 4.0 A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at the point P with coordinates (0.2 m, 0.2 m)..
A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 21.1 N; when it is completely immersed in water, What is the volume of the block
A 50 -N crate is pulled up a 5 m inclined plane by a worker at constant velocity. If the plane is inclined at angle of 37degree to the horizontal and and there exists a constant frictional force of 10 N between the crate and the surface. What is the ..
On a summer day in Houston, the temp. is 35 degrees C and therelative humidity is 75%. What is the humidity
the potential difference between the accelerating plates of a tv set is about 25 kv. if the distance between the plates
A plastic bag is filled with hydrogen at atmospheric pressure and 23.0 oC. what is the required volume of the balloon if the air inside can be maintained at 43.0 oC
A small current element at the origin has a length of 1.2 mm and carries a current of 3.9 A in the +z direction. Find the magnitude and direction of the magnetic field due to this current element at the point (0, 3.7 m, 2.0 m).
A 0.290-kg block along a horizontal track has a speed of 1.60 m/s, What is the spring's maximum compression if the track is frictionless
An object of mass .550 kg is lifted from the floor to a height of3.50m at a constant speed. How much work is done by the lifting force? How much work is done by the Earth on the object? What is the net work done on the object?
A 50 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if dancer is lea..
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