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A construction worker drags a box across the floor. If the frictional force between the floor and the box is 12.2 Newtons, how much work does friction do as the box moves 11.5 meters?
In a typical Hollywood movie stunt, a person jumps off a building and lands on a cushion to safely stop. How much voltage should the battery have to stop the object as it reaches the ground
A circular area with a radius of 7.80cm lies in the x-y plane. What is the magnitude of the magnetic flux through this circle due to a uniform magnetic field B = 0.229T that points in the +z direction
he electric field in a particular region of space is found to be uniform, What is the change in electric potential energy of a charge q = 6.7 uC if it is moved from (x, y) = (20 cm, 45 cm) to (5 cm, 30 cm)
Calculate the electric field at the center of a square 53.7 cm on a side if one corner is occupied by a +38.5 µC charge and the other three are occupied by -29.4 µC charges.
A constant force, F = (4.51, ?3.79, 2.30) N, acts on an object of mass 18.2 kg, What is the total work done by this force
A He-Ne laser beam with an intensity of 1.00 x 103 W/m2 is incident from air to water, Find the intensity of the beam transmitted into the water
In an ultra-low-temperature experiment, a collection of sodium atoms enter a special state called a Bose-Einstein condensate in which the index of refraction is 1.57 107
a skateboarder with an initial speed of 2.1 ms rolls virtually friction free down a straight incline of length 20 m in
A bubble, placed 0.130 meter beneath the surface of a glass of diet Pepsi, rises to the surface. The air pressure at the top is 8.90 104 Pa. obtain the ratio of the volume of the bubble at the top to the volume of the bubble at the 0.130 meter d..
A 78.3?kg bungee jumper is enjoying an afternoon of jumps. The jumper's first oscillation has an amplitude of 10.3m and a period of 4.75s. find the spring constant of the bungee cord
A thin layer of magnesium fluoride (n = 1.38) is used to coat a flint-glass lens (n = 1.61). What atleast thickness should the magnesium fluoride film have if the reflection of 669 nm light is to be suppressed? suppose that the light is incident a..
Standing on the ground 3.5m from a building, you want to throw a package from your 2.0-m shoulder level to someone in a window 3.6m above the ground. At what speed should you throw the package so it just barely clears the windowsill
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