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Water at a pressure of 4 atm, at street level, flows into a building at 0.5 m/s through a 6 cm diameter pipe. The pipe tapers down to a 2 cm diameter by the top floor 20 m above. Calculate the water pressure and velocity on the top floor?
A 2.60×104- rocket blasts off vertically from the earth's surface with a constant acceleration. How far is the rocket above the earth's surface when it breaks the sound barrier
A simple pendulum has a mass of 0.250 kg and a length of 6.00 m. It is displaced through an angle of 14.0° and then released. What is the maximum restoring force
So as to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast must an airplane be moving at the top of a vertical circle with a radius of 1545 m.
If the current through the inductor (L = 25.1 mH) at 351 Hz has an amplitude of 45 mA, what is the rms value of the AC voltage
A string's tension force supplies the centripetal force needed to keep a yo-yo whirling in a circle. What kinds of forces keep a roller coaster held to a looping track
Two waves traveling on a string in the same direction both have a frequency of 236 Hz, a wavelength of 0.40 m, and an amplitude of 0.14 m. What is the phase difference between the two waves
How many cubic centimeters are in a cubic kilometer? The speed of sound in air at sea level is around 340m/s. Express this speed in mi/hr. The speed of light in a vacuum is about 3108m/s. Express this speed in both mi/hr and miles per second.
A small plastic sphere charged to -10 nC in held 1.0 cm above small glass bead at rest on a table. find the maximum charge can the bead have without leaping up
The cross-section of a hollow cylindrical conductor with radii a = 0.90 cm and b = 4.70 cm which carries a current 7.00 Amps uniformly spread over its cross-section. Find the magnitude of the magnetic field at a distance of 2.10 cm from the axis.
in a simplified roller bearing, the inner cylinder has a radius of 1.0 cm and is stationary. What is the angular speed of the small cylinders
At what angle should a curve of radius 155m be banked, so cars can travel safely at 26m/s without relying on friction.
Light with a frequency of 2 X 10^15 Hz shines on a copper surface (=4.70 eV). What is the maximum kinetic energy of the photoelectrons
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