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A 60.0kg crate rests on a level floor at a shipping dock. The coefficient of kinetic friction between the box and the floor is 0.410. What horizontal pushing force is needed to move the box across the floor at a constant speed? Round to the nearest whole number and include units.
Consider two infinite parallel plane conducting plates, of finite thickness, with separation d. Suppose a charge density of σ is placed on one plate, while the other plate has -2σ. Determine the resulting charge densities on each of the 4 surfaces
An astronaut on Jupiter drops a rockstraight downward from a height of 1.20 m.If the acceleration of gravity on Jupiteris 24.8 m/s2, what is the speed of the rock when it lands
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 416 meter per second. Obtain the temperature of the environment
A beam of light is polarized in the horizontal direction and has an intensity I. It then passes through a polarizer oriented at an angle of 39 degrees from the horizontal direction. What fraction of the original intensity I pass through this polarize..
what is the minimum speed need to drive through a banked turn such a car wont slip down the road. the turn is banked at
A baby sitter pushing a stroller starts from rest and accelerates at a rate of 0.500m/s2. What is the velocity of the stroller
In proton-beam therapy, a high-energy beam of protons is fired at a tumor. What is the total charge of the protons that must be fired at the tumor
Two coils of wire are placed close together. Initially, a current of 2.27 A exists in one of the coils, What is the mutual inductance of the two-coil system
A 400g rubber ball is dropped a vertical distance of 12m. It remains in contact by the pavement for .01 sec and rebounds to a height of 10m. What is the total change in momentum? What average force is exerted by the floor on the ball?
In a compound microscope, the focal lengths of the objective andeyepiece are +0.50 cm and +2.0 cm respectively. Compute the magnifying power of the microscope
One solenoid is centered inside another. The outer one has a length of 53.0cm and contains 6600 coils, Find the emf induced in the inner solenoid
Sodium atoms emit 2.10 eV photons. What is the frequency of these photons? What is the wavelength? What is their speed in a vacuum?
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