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One type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What force constant is needed to produce a period of 0.763 s for a 0.0145 kg mass?
A record turntable rotating at 33(1/3)rev/min slows down and stops in 21 s after the motor is turned off. How many revolutions does it make in this time
A fruit fly 2.16 mm long is examined with a simple magnifier. What is the focal length of the magnifier
A model of a venturi meter has linear dimensions one-fifth those of the prototype. The prototype operates on water at 20 degrees Celsius, and the model on water at 95 degrees Celsius. For a throat diameter of 600 mm and a velocity at the throat of..
Suppose a straight 1.35mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B, What current would the wire carry
A parachutist falls 50.0 m without friction. When the parachute opens, he slows down at a rate of 35 m/s^2. how long was he in the air
The magnetic field of the Earth is approximately 0.5 ×104 T. What current in a long straight wire would produce a field of equal strength at a distance of 6 cm from the wire
The speed of a particle in a particle accelerator goes from .50000c to .99950c. Determine the magnitude of final relativistic momentum
Four lawn sprinkler heads are fed by a 1.9 cm diameter pipe. The water comes out of the heads at an angle of 33° to the horizontal and covers a radius of 7.8m. What is the velocity of the water coming out of each sprinkler head? (Assume zero air resi..
A laser beam (? = 632.0 nm) is incident on two slits 0.280 mm apart. How far apart are the bright interference fringes on a screen 5 m away from the double slits?
A small glass bead has been charged to +19 nC. A metal ball bearing 1.0 cm above the bead feels a 0.020 N downward electric force. What is the charge on the ball bearing
Estimate the average speed of the Apollo spacecraft in meters per second, given that the craft took five days to reach the Moon from Earth
The diameter of the moon is 3.78x10^6 m. It subtends an angle of 0.00982 radians at the surface of the Earth. How far is the Moon from the Earth
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