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1. Oil of density .7 g/cm3 is held in a large container, 20m off the ground and filled to a height of 2 m, flows into a 1 cm diameter tube during a hole in the bottom of the container. Estimate the speed at which the oil flows out of the tube at ground level.
a) 7 m/s b)7cm/s c) 21 m/s d) 21 cm/s
2. A square wooden raft sinks halfway into the water unloaded and sinks all the way into the water without sinking when carrying a load of 200 kg. Discover the mass of the raft?
a) 100 kg b) 200kg c) 400 kg d) 980 kg
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz, What is the fundamental frequency of the air column
The coil of a galvanometer has a resistance of 19.8 ?, and its meter deflects full scale when a current of 6.30 mA passes through it. What is the maximum current that this ammeter can read
a subatomic particle of mass m at rest decays into a photon with an energy of 38m moving in the x direction and a
An Atwood's machine consists of blocks of masses M1=10 kg and M2=20 kg attached by a cord running over a pulley. The pulleys is a solid cylinder with mass M=8 kg and radius r=.2 m. The block of mass M2 is allowed to drop, and the cord turns the pu..
What is the work done by the tension in the cable.assume the roller coaster (h1 = 34 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach..
With a particular fingering, a flute plays a note with frequency 583 Hz at 20.0° C. The flute is open at both ends. Find the air column length.
the angular momentum of a spinning wheel is 235kg. after application of a constant braking torque for2.0s it slows and
A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 405. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 90 dB. What sound intensity level..
a 10 kg test rocket is fired vertically. its fuel propels it to a heaight of 100 m, what additional height will the rocket rise given the kinetic energy
One particle has a mass of 2.00 10-3 kg and a charge of +7 µC. A second particle has a mass of 5.00 10-3 kg and the same charge. Find the initial separation between the particles
An asteroid in an elliptical orbit about the sun travels at 1.3 106 m/s at perihelion (the point of closest approach) at a distance of 2.2 108 km from the sun
What is the speed of an electron that is released from rest andaccelerated through a potential difference of 160 volts?
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