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A concrete block of msss 10kg is pulled 7.0m across a frictionless surface by means of a rope and the net work done on the block is 220J. The tension in the rope is 40N and it makes an angle 30 degrees to the horizontal, what is the magnitude of the normal force acting on the block?
A snowboarder starts from rest and glides down a hill that is 100m high. Assuming no friction, what is her speed at the bottom of the hill
An undersea research chamber is spherical with an external diameter of 3.90m . The mass of the chamber, when occupied, is 30800kg. What is the buoyant force on the chamber
For a damped oscillator with a mass of 290 g, a spring constant 80 N/m and a damping coefficient of 57 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 26 cycles.
A 2.0-kg piece of marble at 100 degree C is dropped into 1.5 kg of water at 1.0 degree C, What is the specific heat of the marble
Tritium with a half-life of 12.3 years is used to verify the age of expensive brandies. how many years ago was it produced
A car is traveling counterclockwise along a circular bend in the road with a radius of 200m, What is the magnitude of the cars acceleration
The two liquids do not mix. What is the difference in height between the top surface of glycerine and top surface of the alcohol.
An 1590 kg car stopped at a traffic light is struck from the rear by a 873 kg car and the two become entangled. what is the speed of the entangled mass after the collision
A physicist has developed a device that generates a beam of alpha particles (each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons).
A proton is located at the origin, and a second proton is located on the x-axis at x=6.00 fm. (a) compute the electric potential energy associated with this configuration.
A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 8.48 x10^7 km. Radio waves travel at the speed of light (3.00 x10^8 m/s). How many seconds does it take for the signal to reach the Earth.
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
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