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A horizontal pipe of diameter 120 mm has a constriction of diameter40 mm. The velocity of water in the pipe is 60 m/s and the pressureis 150 kPa.
a. What is the velocity in the constriction?
b. What is the pressure in the constriction?
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 53.0-gram mass is attached at the 27.0-cm mark, What is the mass of the meter stick
25% of a radioactive material stays active after 4 hours. What is the half-life of this radioactive material
q1. a spring with spring constant 12.5 hangs from the ceiling. a 400 ball is attached to spring and allowed to come to
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A 5-A current is maintained in a simple circuit that consistsof a resistor between the terminals of an idealbattery. how large is the resistance
a satellite is describing a circular orbit about the earth with speed v. the satellite is separated into two pieces by
A Sodium surface, which has a work function ? of 2.46 eV is illuminated with ? = 300nm light. Find the threshold frequency for Sodium
a ball with a mass of 12 kg is traveling towards the left at a speed of 10 ms another ball with a mass of 14 kg is
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
A room has two opposing walls which are tiled. The remainingwalls, floor, and ceiling are lined with sound-absorbent material. What are the amplitudes of each the two seperate modes
A hoop and a disk, both of 0.72- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.5 m high and 8.9 m long. What is the speed of the hoop
in the bohr model of the hydrogen atom an electron moves in a circular path around a proton. the speed of the electron
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