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A man pushes a 13 kilogram shopping cart at a constant velocity for a distance of 24.0 meter. She pushes in a direction 27 degree below the horizontal. A 42.0 Newton frictional force opposes the motion of the cart. Evaluate what the work done by gravity.
The tires of a car make 75 revolutions asthe car reduces its speed uniformly from 100 km/h to 50 km/h. Thetires have a diameter of 0.80 m. What was the angular acceleration?
Suppose we have a gas in thermal equilibrium at temperature T. Each molecule of the gas has mass m. (a) What is the ratio of the number of molecules at the Earth's surface to the number at height h(with potential energy mgh)?
an electron moves along the z-axis with vz 4.4 x 107 ms. as it passes the origin what are the strength and direction
An automobile of mass 1500 kg moving at 25 m/s colides with a truck of mass 4500 kg at rest. What is the final velocity of the truck after the collision
A positive object touches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the leaves? Answer They move closer together. They are unaffected. They separat..
Two large parallel copper plates 3cm apart have a uniform electric field among them. An electron is released from the negative plate at the same time a proton is released from the positive plate. Neglecting the force on each other, discover the dis..
The brochure advertising a sports vehicle states that the vehicle can be moving at 100.0 km/h, and stop in 39.75 m. Find its average acceleration during a stop from that velocity
bob is talking to alice using a tin can telephone which consists of two steel cans connected by a 20-m-long taut steel
two people are standing on a meter-long stationary platform one at each end. the platform floats parallel to the ground
a what supports a white dwarf from further collapse? b why cant a white dwarf have mass greater than 1.4m? c what
Four equal charges of +2.5×10-6 C are placed on the corners of one face of a cube of edge length 15.0 cm. A charge of -2.5×10-6 C is placed at the center of the cube. What is the magnitude of the force on the charge at the center of the cube?
A capacitor is constructed of two concentric conducting cylindrical sheels. The radius of the inner cylindrical shell is2.35 x 10-3 m, and that of the outer shell is 2.53 x10-3 m.
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