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Kyle pushes a box across a rough floor with a horizontal force of 15N. If the box has a mass of 22kg and it accelerates at 0.5 m/s^2, what is the force of friction that acts upon it?
A transformer is to be used to provide power for a computer disk drive that needs 6.4 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
A 1.0-kg block of ice at -5ºC is dropped into a 55-gallon barrel of water at 80ºF. What is the final state of the mixture
A 40 N crate starting at rest slides down a rough 6m long ramp inclined at 30 degrees with the horizontal. find the velocity of the crate at he bottom of the incline
An ideal fluid in a pipe of diameter 14cm is moving at 6.0 m/s. If the incompressible fluid density is 1.05g/cc, what is the flow rate in kg/s and what is the speed of flow if the pipe narrows to 4.0cm radius?
A 0.57 kg object connected to alight spring with a force constant of 24.8 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 20 m/s, What does the frequency the horns emit
A 4.38-kN piano is lifted by three workers at a constant speed to an apartment 27.2 m above the street using a pulley system fastened to the roof of the building. find the time required to lift the piano from the street to the apartment
A 1210-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end.
A monatomic ideal gas expands from 1.00 m^3 to 2.5 m^3 at a constant pressure of 2.5 x 10^5 Pa. find the change in internal energy of the gas
bob walks 390m south then jogs 660m southwest then walks 390m in a direction 35circ east of north. a find the
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field.
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