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Two blocks with masses m1 = 2 kg and m2 = 9 kg are attached over a pulley with mass M = 3 kg, hanging straight down as in Atwood's machine (Fig. 8.28b). The pulley is a solid cylinder with a radius 0.05 m, and there is some friction in the axle. The system is released from rest, and the string moves without slipping over the pulley. If the larger mass is traveling at a speed of 2.5 m/s when it has dropped 1.0 m, how much mechanical energy is lost due to the friction of the pulley?
An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has dielectric constant 3.64, What is the speed of propagation of the wave
Water flows through a horizontal tube of diameter 2.9cm that is joined to a second horizontal tube of diameter 2.0cm . The pressure difference between the tubes is 7.6kPa
A woman on a rocket traveling at 0.72c (with respect to Earth) observes a meteor come from in front of her and pass her at 0.72c. How fast is the meteor moving with respect to Earth
A 270 kilogram log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. Evaluate what the tension in the rope
A plane normally takes 10 hours to travel 5, 500 miles. One day significant headwinds slow the plane down, how long will the entire trip take
an earthquake generates three kinds of waves surface waves l waves which are the slowest and weakest shear s waves
A uniform thin rod of length L=2.5 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 0.3 kg ball of putty, moving in the horizontal plane of the rod, hits and sticks to one end. As..
What is the velocity of the boat when it reaches the buoy.
A see-saw board is supported at its center by a fulcrum A 25 kg person sits 80 cm from center. How much force does the fulcrum exert on board
Compute direction of the plane's velocity, relative to the ground. Compute how far from its intended position it will be after 15.0 if the pilot takes no corrective action.
A spherical ball of charge has radius R and total charge Q. The electric field strength inside the ball(r?R) is E(r)=Emax(r4/R4). Find an expression for the volume charge density ?(r) inside the ball as a function of r
A star's temperature is5161K. According to the Stefan-Boltzmann law, how much energy is radiated into space per second by each square meter of the star's surface
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