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Before throwing a 0.905kg discus, an athlete rotates it along acircular path of radius 1.15m. The maximum speed of the discus is23 m/s. Determine the magnitude of its maximum radial acceleration.
Answer in units of m/s2.
You wish to reduce the intensity of a beam of 1-MeV gamma rays from 5.12 x 10^7 per second to 2 x 10^5 per second. What thickness of aluminum is required
Two railroad cars, each of mass 7850kg and traveling 85km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision
A cockroach of mass m lies on the rim of a uniform disk of mass 6 m that can rotate freely about its center like a merry-go-round. calculate the angular velocity of the cockroach-disk system
An electric heater consumes electrical energy at a rate of P = 350 W, What is the maximum power that could be drawn if the circuit contained a circuit breaker that limited the current to no more than 5 A
A man wishes to vacuum his car with a canister vacuum cleaner marked 550 W at 120 V. If the resistance of each of the two conductors of the extension cord is 0.900 Ohm's, what is the actual power delivered to the cleaner
A room with dimensions 10 x 10 x 20 meters is filled with air at 20 degrees C, 101 kPa and relative humidity 0.8. What is the mass of water vapor in the room, in units of kg
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 128 MeV, and the relative biological effectiveness (RBE) of this type of radiation is 16. How many nuclei are in the beam
An open railroad car of mass 2496 kg is coasting with an initial speed of 17 m/s on a frictionless, horizontal track. How much water (in kilograms) has accumulated in the car
A heavy stone of mass m is hung from the ceiling by a thin 8.25-g wire that is 65.0 cm long. When you gently pluck the upper end of the wire, What is the mass m of the stone
n achromatic lens is made of two very thin lenses, with focal lengths f1 = -28.7 cm and f2 = +20.4 cm, What is the focal length of the achromatic lens
a driver puts on the brakes and decelerates from 25 m/s to zero in12.0s. what distance does the car travel
How deep does a point in the middle of the floor of a4-m-deep pool appear to a person standing 2.8 meters horizontally from the point? Take the refractive index for the pool to be 1.3 and for air to be 1. (Assume the person is standing in the pool wi..
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