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A 2 cm aluminum bar issued as a part of a temperature control switch for a high temperature operation. At 200oC the bar has elongated sufficient such that it now touches a second contact causing the switch to close. How far away from the other contact is the end of the bar at room temperature (20oC)?
A rotating cylinder about 16- {rm km} long and 6.8 -km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the similar acceleration because of gravity as on Eart..
A loudspeaker of mass 25.0 is suspended the distance of = 2.40 below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.50. What is the tension in each of cables.
Assume that the reservoir is 200m deep, held back by the dam wall . A small horizontal pipe at the base of the dam transfers water to the generator hall, where it gushes out at high speed and is used to turn the turbines that generate electricity. Wh..
The fundamental frequency of a closed organ pipe is 264.9 Hz. What is the length of the open pipe
A pipe that is closed on one end is 1.2 meters long. What are its fundamental frequency and its first two overtones? What are its new first and second harmonic frequencies
An object is moving along a straight line and the uncertainty in its position is 1.5 m. Find the minimum uncertainty in the momentum of the object
Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in. layer of brick and an R-19 layer of insulation, What is the total rate of heat loss through such a wall
In a certain region, the earth's magnetic field has a magnitude of5.4 x 10-5 T and it is directed north at an angle580 below the horizontal. An electrically charged bulletis fired north and 110 above the horizontal with a speedof 670 m/s. The magneti..
A penny slides off a table 30in high and falls straight to the floor. How long does it take for the penny to fall
At the moment of release, a baseball player has a horizontal velocity component of 39 meters per second, At what angle was the ball released
a common he-ne laser emits light of wavelength 633 nm with a bandwidth of 1.00 x 108 hz. find the uncertainty in energy
From colonial times through the 1960s, the primary mode of mental illness treatment was institutional. What factors were responsible for this shift
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