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The length of each edge of an aluminum cube is 0.068 m. Thecube is heated to 152°C from 25°C. What is the increase in the surface area of the cube? (Hint: The length of each edge ofthe cube expands when heated.)
To pull a 30 kg crate across a horizontal frictionless floor, a worker applies a force of 190 N, directed 20° above the horizontal. The crate moves 3.0 m. (a) What work is done on the crate by the worker's force? (b) What work is done on the crate by..
A steel rod of mass m and length L has the linear expansion coefficient X. It is standing vertically and supports a box of mass M on its top. what is the work done by the rod
An airtight box having a lid with an area of 14.0in2 ( 90.32cm2 ) is partially evacuated. what is the air pressure in the box
Sand from a stationary hopper falls onto a moving conveyor belt at the rate of dm/dt = 5 kg/s as shown. The conveyor belt is supported by frictionless rollers, Find the force of friction exerted by the belt on the sand
A horizontal pipe contains water at a pressure of 150 {rm kPa} flowing with a speed of 1.30 {rm m/s}. The pipe narrows to one-half its original diameter. What is the speed of the water.
Comet Halley has an orbital period of about 75 years. Determine the average distance of Comet Halley from the sun in AU
After the interaction, the particles (which can't be distinguished) are observed moving at angles 55.3° and 34.7°, both angles being measured with respect to the original direction of motion. Illustrate what are the final speeds of the particles?..
During an adiabatic process, the temperature of 3.92 moles of a monatomic ideal gas drops from 485 oC to 205 oC. For this gas, find (a) the work done by the system, (b) the net change in internal energy of the system, and (c) the net heat absorbed by..
A centrifuge in a medical laboratory rotates at an angular speed of 3400 rev/min, Find the constant angular acceleration of the centrifuge
Joe, standing stationary on a beach, sees a small boat of mass M = 195 kg go by at constant speed V = 13.1 m/s. Tom, a man of mass m = 88.5 kg, Find the speed of the boat v, relative to Joe
A camera is equipped with a lens with a focal length of 30cm. when an object 2 m (200cm) away is being photographed; how far from the field should the lens be placed? What is the magnification?
The rope wrapped around the outer diameter of the disk is pulled at a constant speed of 1.55 m/s. how fast does the hanging mass rise
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