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An elevator has mass 680kg , not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0m (five floors) in 16.8s , and it is driven by a motor that can provide up to 41 hp to the elevator. What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg.
Gas is contained in an 6.5 L vessel at a temperature of 20°C and a pressure of 9.8 atm. How many molecules are in the vessel
Two astronauts are at rest in outer space, one 12.1 m from the Space Shuttle and the other 24.2 m from the Shuttle. Using a 151.0-W laser, how long will it take her to reach the Space Shuttle
500 grams of water initially at 3.00 c and a 10.0 gram ice cube at 0.00c are placed together in an insulated styrofoam cup of negligible heat capacity. find the final temperature of the contents of the cup
What is the magnitude of the magnitic filed.
The mousetrap car has a mass of 100 grams and starts travelling at the speed of 1.80 m/s and after 5seconds get the rested? What force did the motor exert.
A diving board oscillates with simple harmonic motion of frequency 3.36 cycles per second, What is the maximum amplitude with which the end of the board can vibrate in order that the pebble placed there not lose contact with the board during oscillat..
In diving to a depth of 983 m, an elephant seal also moves 693 m due east of his starting point. What is the magnitude of the seal's displacement
The last exhibit had a cylinder of mass 1.2 kg and radius .2 meters rolling down an incline with a linear velocity of 2 m/s. How much torque must be exerted by the friction force
A certain ideal gas has a molar specific heat at constant volume CV = 7R/5. What is its molar specific heat at constant pressure
A cannon fires a cannonball from the top of a wall at a speed of 25.58 m/s and an angle of 17.44 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
A 1100 kg block of granite is pulled up an incline with L = 40.0 m at a constant speed of 1.06 m/s by a steam winch. What is the power of the winch
A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.5rev/s. find the frequency of the wheel after the clay sticks to it
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