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A 52-kg mountain climber, starting from rest climbs a vertical distance of 730m. At the top, she is again at rest. In the process, her body generates 4.1*10^6J of energy via metabolic processes. In fact, her body acts like a heat engine, the efficiency of which is given by Eqn 15.11 as e=[W]/[QH], where [W] is the magnitude of the work she does and [QH] is the magnitude of the input heat. Find her efficiency as a heat engine.
A uniform meter stick is in static rotational equilibrium when a mass of 220 g is suspended from the 5.0 cm mark, What is the mass of the meter stick
A Geosync TV satellite of mass 2000 kg is in a circular orbit around the earth, making one revolution or orbit every 24 hrs, What is the magnitude of the centripetal acceleration
A solenoid of radius 4.0 cm has 300 turns and a lenght of 25 cm. What is the inductance of the Coil?
A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.400 mm2. What is the current in the wire
When she tightens the string slightly, she hears 6 beats/s. What is the frequency of string now.
A home (volume = 1000 m3) built in 1946 has urea formaldehyde insulation, which outgases into the home at a rate of 5 ng/hr, What is the steady state concentration (C) of formaldehyde in the home
A light beam is incident on heavy flint glass (n = 1.62) at the polarizing angle. Calculate the angle of refraction for the transmitted ray
Calculate approximately E at a distance of 40 m (large relative to the plate size) by assuming that the plate is a point charge.
During the Millikan experiment used to determine the charge on the electron, a charged polystyrene microsphere is released in still air in a known vertical electric field, How many excess electrons are on the sphere
This seemed pretty straight foward but i get a bad anwser. In the solutions for this problem they just took the diameters, What is the speed in the second segmen
As you walk across a synthetic-fiber rug on a cold, dry winter day, you pick up an excess charge of -56?C, What is the charge on the rug as a result of your walking across it
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
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