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A man is in a chair that is attached with a rope that goes over amass less, frictionless pulley and back down to the man's hand. Combined mass is 104.0 kg.
With what force should he pull the pulley in order to rise with a constant velocity?
if a proton moved from a location with 10.0v potential to a location with 25.0v potential would its potential energy
Moist air at 12oC and 80% R.H. enters a duct at a rate of 150 m3/min. The mixture is heated until it exits at 35oC. The pressure remains constant at 100 kPa. Determine (a) the rate of heat transfer, and (b) the relative humidity at the exit.
A 0.0422-m3 container is initially evacuated. Then, 7.24g of water is placed in the container, and, after some time, all of the water evaporates. If the temperature of the water vapor is 370K, what is its pressure?
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.90 m/s2 for 4.45 s, With what speed does the car then strike the tree
Use Gauss' law to determine the magnitude of the electric field intensity at point r units away from an infinitely on thin wire carrying a charge λ unit per length. (Consider a cylinder of length L and radius r concentric with the wire.)
consider a common mirage formed by super-heated air just above a roadway. a truck driver whose eyes are 2.00 m above
The primary winding of an step-up transformer has 100 turns and the secondary has 1300 turns. If the RMS input voltage is 110 V, what is the RMS output voltage
A 69.3-kg circus performer is fired from cannon that are elevated at an angle of 40.4° above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone.
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. With what speed does the ball leave the plate
even as Jo moves off in the opposite direction at a speed of 1.27m/s. assuming that friction is negligible, find out Al's mass.
At a certain location, the horizontal component of the earth's magnetic field is 2.2 10-5 T, due north. Find the speed of the proton
Consider a hot-air balloon. The deflated balloon, gondola, and two passengers have a combined mass of 315 kg, Then find the temperature of the air inside the balloon
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