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A person (body mass=72 kg) is taking off for a long jump. Ground reaction forces Fg,x = 250 N and Fg,z = 900 N. Calculate the resultant ground reaction force?
A 410 W Carnot engine operates between constant-temperature reservoirs at 98°C and 49°C. find the rate at which energy is exhausted by the engine as heat
The impact of the head of a golf club on a golf ball can be approximately regarded as an elastic collison. what must the speed of the club be before impact
It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). What is the angular speed of the earth
A ball is tossed from an upper story window of a building. Compute the height from which the ball is thrown.
A piece of a wire, with the cross-sectional area of 0.5176 mm2 and 1.80 m long, What is the resistivity of the material of the wire
Explain the di?erences between the electron energy spectrum of β- decay and that from an internal conversion process. What are the di?erences of these two decay mechanisms?
A rocket is fired vertically upward. At the instant it reaches some altitude with a speed of 100 m/s. What is the velocity of the third fragment immediately after the explosion
Two small charges with a mass of 1.0 g each are connected by a 2.0 cm long insulating rod of negligible mass. Calculate the magnitude of the torque exerted on the rod by the electric field
As the temperature of ice is increased, it changes first into a liquid and then into a vapor. How might one produce liquid carbon dioxide
The mass of a flywheel is 6.0 x10^4 kg. This particular flywheel has its mass concentrated at the rim of the wheel. what is the magnitude of its angular momentum
A rock is dropped off a bridge and hits the water below 3 s later. The rock is going 30 m/s before it hits the water. what is the height of the bridge above the water
A man goes fishing for dinner. He walks 5 km due West from his house, and tries to catch a fish, after 5 hours and no fish, he walks 5 km due North. What is the color of the bear
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