Determine the efficiency of the ramp
A constant push of 250 N is necessary to slide a crate weighing 400 N along a 2.0-meter-long ramp. If the ramp raises the crate 1.0 m, what is the efficiency of the ramp?
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The advertisement tells you that it can travel 1/4 mile in 20 seconds! Are you making a good decision? Is this a fast car? How do you arrive at your conclusion?
Twelve equal charges are situted in a circle with radius R, and they are equally spaced. What is the net force on a charge +Q at the centre of the circle?
Suppose a ball rolls off a horizontal table and lands 1.5m out from the edge of the table. If the tabletop is 90cm above the floor, determine the time the ball is in the air.
How caloric needs change during each trimester of pregnancy. What changes occur in protein, vitamin, and mineral requirements? What are the possible consequences to the mother and infant if these changes are not met?
A string under a tension of 43.0 N is used to whirl a rock in a horizontal circle of radius 2.60 m at a speed of 21.0 m/s. The string is pulled in and the speed of the rock increases. When the string is 1.00 m long and the speed of the rock is 51
An assumption made by the Bush administration in selecting this location was that it was beyond the jurisdiction of U.S. courts. The administration wanted to avoid any judicial oversight of how it handled detainees, characterized as "enemy combatants
A 3.0 mol sample of an ideal monatomic gas undergoes a reversible process at constant volume, increasing its temperature from 300 K to 400 K. What is the entropy change of the gas?
The image of a distant tree is virtual and very small when viewed in a curved mirror. The image appears to be 19.6 behind the mirror. What is its radius of curvature?
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