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Two crewmen pull a raft through a lock . One crewman pulls with a force of 130 at an angle of 34 relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45. With what force should the second crewman pull so that the net force of the two crewmen is in the forward direction?
A 62.5 skier is moving at 6.00 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.10 long. How fast is the skier moving when she gets to the bottom of the hill
Consider single slit Fraunhofer, what is the ratio of irradiance at the central peak maximum to the first of secondary peak
An Automobile engine slows down from 4500 rpm to 1200 rpm in 2.50 s. Calculate (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
A typical lightbulb in your house is rated 200 W, which means that the bulb dissipates 200 W when connected to a DC voltage of 110 V. What is the current through the lightbulb
A batter hits a baseball m = 0.48 kg from rest with a force of F = 86 N, The ball is in contact with the bat for t = 0.26 s. How far did he ball travel horizontally in meters
By calculation, determine the wavelength of three principal visible lines of hydrogen from energy transitions n=3, 4
q1. a child is sliding on a sled at 1.6 rm ms to the right. you stop the sled by pushing on it for 0.80 rm s in a
The water is near freezing in temperature. Typically a human can only swim in such water for about 300 seconds (or 5 minutes) before hypothermia sets in. Calculate the time the explorer spends in the water
Planet-X has a mass of 5.28×1024 kg and a radius of 7870 km. What is the First Cosmic Speed i.e. the speed of a satellite on a low lying circular orbit around this planet? (Planet-X doesn't have any atmosphere.
If lithium ion Li+2 is treated as a classical system of one electron of charge ?e going around a nucleus of charge 3e on a circle of radius 1.77× 10?11 m, find the ionization energy of the electron
A large turntable rotates about a fixed vertical axis, making one revolution in 5.00 s. What is the angular speed of the turntable when the child is 2.50 from the center, assuming that you can treat the child as a particle
During the supine bicycle exercise, analysis the shoulder, the hip, and the knee during the movement phase: What motions are occurring at the joint, What are the planes and axes of the movement
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