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A skateboarder slides down a frictionless ramp inclined at an angle of 30 degree to the horizontal. He then slides across a frictionless horizontal floor and begins to slide up a second incline at an angle of 25 degree to the horizontal. The skateboarder starts at a distance of 10 meter from the bottom of the first incline. Obtain how far up the second incline will him go if the coefficient of kinetic friction on the second incline is 0.10?
electric train consider the possibility of a new design for an electric train. the engine is driven by the force on a
One of the most efficient engines ever built is a coal-fired steamturbine in the Ohio valley, driving an electric generator as itoperates between 1870°C and 430°C. What is its maximum theoretical efficiency
Think the Bohr energy expression (Equation 30.13) as it applies to singly ionized helium He+ (Z = 2) and an ionized atom with Z = 4 and only a single electron orbiting the nucleus. This expression predicts equal electron energies for these two specie..
A scientific instrument that weighs 78.4 on the earth weighs 29.7 at the surface of Mercury. What is the acceleration due to gravity on Mercury
Assume it takes 8.00 min to fill a 25.0-gal gasoline tank. (1 U.S. gal = 231 in.3) (a) Calculate the rate at which the tank is filled in gallons per second. (Please provide numerical answer in gal/s)
a steady wind of 25 knots over a very long fetch can create waves of 3-meter height a period of approximately 10
An 77 box of oranges is being pushed across a horizontal floor. As it moves, it is slowing at a constant rate of 0.90 each second. compute the coefficient of kinetic friction between the box and floor
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 11.3 m/s, How high will be the highest point of trajectory
Magnetic measurements have been made on some lavas found at 60*N, 90*W. what is the subsequent error in the calculated paleolatitude
Water at 900 psi, 800ºF undergoes an adiabatic, reversible process until the pressure is 1 psi. Find the phase of the final state
three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. the cubes are
Two thin lenses with focal lengths of magnitude 15.0 cm, the first diverging and the second converging, are placed 12.00 cm apart. How far from the object is the final image formed
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