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A 150-N sled is pulled up a 28 degree slope at a constant speed by a force of 100N. What is the coefficient of kinetic friction between sled and slope?
A guitar string is 90 cm long and has a mass of 3.6g . The distance from the bridge to the support post is L=62cm, What is the fundamental frequency of this string
Use the free electron model to estimate the gap parameter ?0 and the transition temperature Tc for (a) aluminum (1.81 x 10^29 electrons/m3 ) and (b) zinc (1.31 x 10^29 electrons/m3 ).
A 1200-kg cannon shoots a 28-kg shell at an angle of 25° above the horizontal and a speed of 470 m/s. What is the recoil velocity of the cannon
3 amperes of current flow through a wire. What net charge flows past a point in the wire each second
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 82.1 N, Jill pulls with 64.3 N in the northeast direction, What is the direction of the net force
Suppose 2.5 mol of an ideal gas is taken from a 6m3 to a volume of 3 m3 via an isothermal compression at 30 0C. Find work done during the compression
A 2.00 kg crate starting at rest slides down a rough 5.00 m long ramp, inclined at 25º with the horizontal. what is the speed of the crate at the bottom of the incline
Landing on the Moon, a spacecraft fires its retrorockets and comes to a complete stop just 19m above the lunar surface. It then drops freely to surface.How long does it take to fall in seconds? What is its impact speed in meter per seconds.
Imagine that in the distant future NASA lands a manned mission on one of many Jupiter's moons, Calculate the diameter of the moon
a beam of light is incident from air on the surface of a liquid. if the angle of incidence is 29.0deg and the angle of
A 0.25-kg mass is hanging from a spring with spring constant 15 N/m. What is the resulting angular frequency of the oscillation
a driver must change a tire that has a stuck lug nut. a torque of 288 inch-pounds is required to free the nut. how
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