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An astronaut in an orbiting spacecraft is ''weighed'' by being strapped to a spring of constant k = 385 N/m, and set into simple harmonic motion. If the oscillation period is 3.0 s, what is the astronaut's mass?
The amount of 14C in an old, isolated sample of vegetation is 0.757 that expected from a present day sample with an equivalent carbon content, Calculate the age of the old sample in years
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the period of the orbit
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
A 47% efficient device uses chemical energy to generate 550J of electric energy. How much chemical energy is used
A 0.150-kg block of ice is placed against a horizontal, compressed spring mounted on a horizontal tabletop that is 1.20 m above the floor. The spring has force constant 1900 N/m and is initially compressed 0.045 m. The mass of the spring is negligibl..
A wave traveling along the x axis is described mathematically by the equation y = 0.17sin(8.1?t + 0.82?x), What is the speed of the wave
A fire hose 10 cm in diameter delivers water at the rate of 16 kg/s. The hose terminates in a nozzle 3.4 cm in diameter. What is the flow speed in the nozzle
A 40 cm wire is moved perpendicularly during a magnetic field of 0.32 T with a velocity of 1.5 m/s. If this wire is connected into a circuit of 12 ohms resistance, what is the current?
A 42.00kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
Because of the cramped space under the hood, you'll need to pull at an angle of 105 with respect to the wrench shaft. Illustrate with what force must you pull?
If the trough is being filled with water at the rate of 0.3 m3/min explain how fast is the water level rising when the water is 10 cm deep?
a rocket is attached to a blob made of clay which weighs 0.270 kg. the rockets power is 1.4 w. it applies a constant
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