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A rubber ball is vigorously rubbed with a piece of fur, which gives the ball a charge of -69.6 nC. To the nearest tenth of a nanocoulomb, what must be the charge on the piece of fur?
a body of mass 7.06 kg moves along the x axis influenced by a conservative-variable force fx -4x3 the bodys initial
a 0.40kg soccer ball approaches a player horizontally with avelocity of 20m/s to the north. what impulse was delivered by the player
Monochromatic light is incident on a metal surface. The ejected electrons give rise to a current in a circuit. how will the required stopping potential change
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.60×106N, What is the total work done by the two tugboats on the supertanker
During takeoff, an airplane goes from 0 to 50 m/s in 8 s.-What is its acceleration?
A string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. What is the wavelength of the first harmonic
The density of a 5.0-m long rod can be described by the linear density function ?(x) = 125 g/m + 13.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 5 m
Calculate the displacement and velocity at times of 0.500, 1.00, 1.50, 2.00 and 2.50 s for a rock thrown straight down with an initial velocity of 11.2 m/s from the Verrazano Narrows Bridge in New York City
An atom in a solid vibrates at 16THz with amplitude 13pm. Find the atom's maximum acceleration. Then, if it's a carbon atom, what's its energy
Determine the engine's efficiency in percents, defined as the ratio of the work done to the heat absorbed during the cycle.
A hollow cubical box, 0.28 meter on a side, with walls of negligible thickness floats with 30 percent of its volume submerged. Find what mass of water can be added to the box before it sinks
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. what is the specific heat of the object
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