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A stunt pilot weighing 0.70 kN performs a vertical circular dive of radius 0.80 km. At the bottom of the dive, the pilot has a speed of 0.20 km/s which at that instant is not changing. What force does the plane exert on the pilot?
One of the fastest recorded pitches in major-league baseball, thrown by Tim Lincecum in 2009, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away
A heat engine is composed of of a monatomic ideal gas which runs in the following cycle: At point A the pressure is 2.6 atm, What is the efficiency of this heat engine
A grinding wheel is initially at rest. A constant external torque of 47.2 N· m is applied to the wheel for 18.8 s, Find the frictional torque, which is assumed to be constant
A 1.1 kg birdfeeder hangs from a horizontal tree branch. The birdfeeder is attached to the branch at a point that is 1.0 m from the trunk. where the branch attaches to the trunk
Two resistors A and B are 60,000 and 40,000 (omega sign) respectively and are in series across a constant power supply of 100V. What amount of current is flowing in each of the 3 resistors
Light of wavelength 60nm illuminates a hydrogen atom in an excited state. What energy level was the electron in initially
Suppose that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385 torr. If all the oxygen as is removed from the mixture by reaction with phosphorus
A large piece of cork weighs 0.295 N in air, he spring scale reads 0.903 N. Find the density of the cork
For the helium-neon laser, estimate the Doppler broadening of the output wavelength 632.8 nm at T = 243 K
A wire cable is rated to have a maximum power of 308 W. If the potential difference is 110 V, what maximum current can the wire handle
A Ferris wheel with radius 38m is driven by a motor that exerts a force on the wheel 1m from the center. find the normal force at the bottom of the wheel's trajectory
0.700-kg ball traveling horizontally on a frictionless surface approaches a very massive stone at 20.0 m/s perpendicular to wall, What is the magnitude of the change in momentum of the stone
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