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A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He abruptly starts down a 12°incline. His speed at the bottom is 15 m/s.
a) What is the length of the incline?
b) How long does it take him to reach the bottom?
What is the highest speed with which a 1550 car can round a turn of radius 76 on a flat road if the coefficient of static friction between tires and road is 0.50.
A boxer punches another boxer with 2500N of force. The boxer's fist was traveling 10 m/s at the time of impact. What was the effective mass of the boxer throwing the punch
A baseball coach shouts loudly at an umpire standing 3.8 meters away. If the sound power produced by the coach is 2.2 × 10?3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.
An organ pipe open at both ends is vibrating with n=5 with a frequency of 646 Hz. The length of the pipe is 0.5 m. Determine the speed of sound in air in the pipe
A typical adult ear has a surface area of about 2.10 10-3 m2. The sound intensity during a normal conversation is about 3.20 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
Find the speed of sound in a thin rod of copper, which has a sheer modulus of 4.5 1010 Pa and a density of 8.90 103 kg/m3
Figure 28-50 shows a wood cylinder of mass m = 0.246 kg and length L = 0.0755 m, with N = 23.0 turns of wire wrapped around it longitudinally, so that the plane of the wire coil contains the long central axis of the cylinder.
when a person is given intravenous fluid the bag containing the fluid is typically held about 0.9 m above the persons
Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball being kicked on the playing field. How far is each spectator from the player
A steam turbine is used to test a well insulated air compressor. The inlet temperature and pressure of the turbine are 5 MPa and 400 C. Calculate the steam mass flow rate through the turbine
The coefficient of static frictionbetween hard rubber and normal street pavement is about 0.8. On how steep a hill (maximun angle) can you leave a carparked
A hockey puck is sliding across a frozen pond with an initial speedof 9.9 ms. It comes to rest after sliding a distance of28.5 m. What is the coefficient of kinetic friction between the puck and the ice?
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