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An audience of 1800 fills a concert hall of volume 2.2×104 m^3.
If there were no ventilation, by how much would the temperature of the air rise over a period of 2.0 h due to the metabolism of the people (70 \rm W/person)? Assume the room is initially at 293 {\rm K}
A 45.0 kg girl is standing on a 159 kg plank. The plank, originally at rest, isfree to slide on a frozen lake, which is a flat, friction less surface. What is her velocity relative to the surface of ice
The full diameter of a wheel is 99 , and its rotational inertia is 6.1. What is the minimum mass it could have? How could it have more mass
the overall volume compression ratio of a reversed carnot cycle working with air as a refrigerant is 10. the
Coherent light with wavelength 600 nm passes through two very narrow slits and the interference pattern is observed on a screen 5.00 m from the slits. The first-order bright fringe is at 4.74 mm from the center of the central bright fringe. For what ..
A white billiard ball with mass mw = 1.34 kg is moving directly to the right with a speed of v = 3.02 m/s, What is the final speed of the white ball
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 4.0 m/s. What is the volume flow rate through the pipe
A loudspeaker of mass 18.00 kg is suspended a distance of h= 1.60.below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of t= 3.90 m. What is the tension in each of the cables? Use 9.80 for the magnitude ..
a 760 kg light weight helicopter ascends from the ground with an acceleration of 2.5m/s^2. what is the work done by the lifting force
A horizontal force F{x} =F0 (1-t / T), which decreases from F0 at t =0 to zero at t =T, is exerted on the object. Find an expression for the object's velocity
If two adjacentnatural frequencies of an organ pipe are determined to be 475 Hzand 575 Hz calculate the frequency and length of the pipe
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the velocity of the electron and direction
Inside the house where the temperature is 20C, we measure the length of an aluminum rod with a micrometer made of steel, find the length of the cold rod according to the cold micrometer
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