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Air in a cylinder is compressed to one-tenth of its actual volume without change in temperature. Explain what happens to its pressure? Imagine now that a valve is opened in order to restore the initial pressure value. Obtain what percentage of the molecules has escaped?
A 2.4 mm-diameter copper wire carries a 30 A current (uniform across its cross section). Determine the magnetic field at the surface of the wire
selzer estimates the total cost of servicing the warranties will be $120,000 for 2 years. Estimate revenues earned on basis of costs incurred an estimated costs.
Ellen and Angela each have a mass of 45 kg, and they are moving together with a speed of 10.0 m/s. What is their combined kinetic energy? What is the ratio of their combined mass to Ellen’s mass?
problem- building office room. length 10m width 8m height 4m. four pillars support four beam. the beams should have
a computer disk drive spins at 7200 rpm when a brief 30 second power outage occurs. during this time the drive slows
A 27.0 gram object moving to the right at 18.0 cm/s overtakes and collides elastically with a 10.0 gram object moving in the same direction at 15.0 cm/s. Evaluate the velocity of both object after the collision
The total momentum of a closed system is observed to be 532 kg•m/s east. compute the total momentum of the system
A magnetic field is oriented at an angle = 60 degrees to the normal of a rectangular area. what is the area of a rectangle
question two insulating spheres have radii r1 and r2 masses m1 and m2 and uniformly distributed charges -q1 and q2.
The molar mass of oxygen gas is 32.0 x 10^-3 kg/mol. If the gas is at 16 degrees C, find the root-mean-square speed for an oxygen molecule
what would the g-force kinetic energy and overall force a human head would absorb if they were broadside t-boned by an
two blocks are pressed together, compressing a spring, the system is then released from rest on a level, frictionless surface. the spring is not attacthed to either block and drops to the surface after it is expanded. i need to demonstrate whether th..
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