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A refrigerator has to transfer an average of 263 J of Heat per second from -10°C to 25°C.Calculate the average power consumed. Assume that the refrigerator is ideal.
a student slides her 80.0-kg desk across the level floor of her dormitory room a distance 2.00 m at constant speed. if
A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 seconds before reaching the water below. How high is the bridge from the water? How far horizontally does the rock travel before striking the water.
a 520 w carnot engine operates between constant-temperature reservoirs at 109degc and 67degc.a what is the rate at
An electric dipole consists of 1.0 g spheres charged to 2.0 nC at the ends of a 13-cm-long mass less rod. What is the dipole's angular velocity at the instant it is aligned with the electric field
A proton moving at a speed of 3.8 ´ 106 m/s cutsacross the lines of a magnetic field at an angle of 30°. The strength of the field is 0.25 ´ 10-4 T. What is the magnitude of the force acting on the proton?
A block of mass m=1.40 kg oscillates in simple harmonic motion due to the force of the spring to which the block is attached to. Express the displacement of the spring in terms of A when v= vm/2 and find its value
A beam of light traveling in air strikes the surface of mineral oilat an angle of 19.8° with the normal to the surface. If the light travels at 2.17X108 m/sin the oil,
Suppose that one-half the mass of the sphere has a density of 2.70 x 103 kg/m3, What is average density of the sphere
A length of copper wire carries a current of 12 A, uniformly distributed during its cross section. The wire diameter is 2.5 mm, and its resistance per unit length is3.5 /km. Compute the energy density of the magnetic field at the surface of the wire.
an adventurous archaeologist crosses between two rock cliffs by slowly going hand-over-hand along a rope stretched
Spiderman uses his spider web to save a runaway train. His web stretches a few city blocks before the 104 kilogram train comes to a stop. Suppose the web acts like a spring, determine the spring constant
A uniformly charged, thin ring has radius 10.0 cm and total charge + 15.0 nC. An electron is placed on the ring's axis a distance 30.0 cm from the center of the ring and is constraned to stay on the axis of the ring. The electron is then released ..
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