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The air inside a bicycle tire pump has 170 joules of work done on it as 84.9 joules of heat is conducted away from it. What is the change in internal energy of the air?
Consider the motion of an apple and the Earth as the apple falls to the ground. If the apple begins at the top of a tree of height 11 m, Estimate the mass of an apple
q1. a motorist drives along a straight road at a constant speed of 15.0 ms. just as she passes a parked motorcycle
A battery delivers 2.54A to a resistor rated at 4.60? . When it is connected to a 2.15? resistor, it delivers 4.98A. Determine the battery's terminal voltage
Planets go around the sun in elliptical orbits. The extremely exaggerated diagram below shows a portion of such an orbit and the force on the planet at one position along that orbit. The planet is moving to the right. F|| and F are the components of ..
Suppose that a planet were discoveredbetween the sun and Mercury, with a circular orbit of radius equalto {\frac{2}{3}} of the average orbit radius of Mercury. What would be the orbital period of such aplanet
The average depth of oceans is about 4km, the oceans cover abou 70% of earths suface. Make an order of nagnitude estimate of the waters volune in he ocean.
in the bohr theory of the hydrogen atom an electron moves in a circular orbit about a proton assume the radius of the
A 3.0-kg 14-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 18 N.
A certain parallel-plate capacitor is filled with a dielectric for which ? = 6.5. The area of each plate is 0.038 m2, and the plates are separated by 2.0 mm. The capacitor will fail (short out and burn up) if the electric field between the plates exc..
A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. What is the acceleration of the hockey puck
An electron moving along the x axis has a position given with x = 17.0 te^-t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?
Two 10-cm-diameter charged rings face each other,15.0 cm apart. Both rings are charged to + 50.0 nC. What is the electric field strength at the midpoint between the two rings? at the center of the left ring?
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