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A 70-kg crate is lowered from a loading dock to the floor using a rope passing over a fixed support. The rope exerts a constant upward force on the crate of 500N (a) Will the crate accelerate? explain (b) what are the magitude and direction of the acceleration of the crate?
illustrate what is the magnitude of the acceleration of the box and hanging mass?
consider a mass of 20kg on the left and another 10kg on the right connected by a rope and being pulled to the right
A cylinder of a car's enginehas a volume of .725 L when the piston is at the bottom of the cylinder.When the piston is at the top of the cylinder it has a volume of 0.050 L.If the cylinder is filled with air at a pressure of 1 atm when the pistonis a..
A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. A particular small car, with a mass of 92..
A film of soapy water (n = 1.33) on top of a sheet of crown glass has a thickness of 220 nm. What wavelength is most strongly reflected if it is illuminated perpendicular to its surface? (This is the apparent color of the soapy film.)
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 53.0 degree. Find the angle the resultant force makes with dog
A gas is compressed at a constant pressure of 0.800 atm from 12.00 L to 2.00 L. In the process, 410 J of energy leaves the gas by heat. what is the change in its internal energy
A metal cylinder with a mass of 0.7 kg and a radius of 0.12 m rolls up an inclined plane. What is the rotational kinetic energy of the cylinder at the bottom of the incline
a sky diver with parachute unopened falls 631 m in 15.6 s. then she opens her parachute and falls another 347 m in 133
A count rate meter is used to measure the activity of a given sample. At one instant, the meter shows 4.750 counts/min. Five minutes later, it shows 2700 counts/min.
A 460 W heating unit is designed to operate with an applied potential difference of 116 V. By what percentage will its heat output drop if the applied potential difference drops to 112 V
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
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