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A 29 kg sled starts from rest at the top of a frictionless hill inclined at an angle of 20 degrees to the horizontal. Find
A) The normal force on the sled due to the hill.
B) The sled's acceleration, and
C) How long it will take the sled to slide 33 m down the hill.
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 18.0 cm, Find the electric field just outside the paint layer
An X-ray photon with a wavelength of 0.250nm nm scatters from a free electron at rest. Find the initial momentum of the photon
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
Unpolarized light with an intensity of 660 W / m2 is incident on a polarizer with an unknown axis. What is the angle between the axes of the polarizers
think about the modes of substances in the gas phase and explain why potential energy is included in the thermal energy of some substances in the gas phase, when a monatomic solid/liquid turns into a gas, what are the PE and KE equal to then
Assume the volume of the tank and the temperature of gas remain constant all through this operation.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided. Do this on paper. Your ins..
The wheel of a car has a radius of 0.360 m. The engine of the car applies a torque of 327 N·m to this wheel, What is the magnitude of the static frictional force
A barge of mass 5x 10^4 kg is pulled along the Erie Canal by two mules, walking along towpaths parallel to the canal on either side of it. The ropes harnessed to the mules make angles of 45° to the canal.
air traffic controllers usually describe the position of an aircraft relative to the airport by altitude, What are the x, y, and z components (in meters) of hte position vector
A pair of speakers separated by 0.700m is driven by the same oscillator at a frequency of 662Hz. An observer, originally positioned at one of the speakers, begins to walk along a line perpendicular to line joining the speakers. (Assume the speed o..
An astronomical telescope uses an objective power of +1.280 D. If the length of the telescope is 80.000 cm, what are power of the eyepiece
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