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A 14.0kg bucket is lowered vertically by a rope in which there is 169 N of tension at a given instant. What is the acceleration of the bucket?
A fireworks rocket explodes at a height of 100 m above the ground. What is the total sound energy of the explosion
An AC generator supplies 185 V peak voltage at 110 Hz frequency. How much power is dissipated in a resistor with R = 295 ? resistance connected to the generator?
find the magnetic field at the center of a set of helmholtz coils each with radius r0.1m and each carrying a total
Using the mass-luminosity relationship if a main sequence star has a luminosity of 3000 times the luminosity of the Sun, what is its mass in relation to the Sun?
A woman stands on the edge of a cliff and throws a stone vertically downward with an initial speed of 10 m/s. the instant before the stone hits the ground below, it has 450 j of kinetic energy. if she were to throw the stone horizontally outward from..
q1. a 346- uniform 1.04- bar is suspended horizontally by two vertical cables at each end. cable a can support a
It is desired to construct a solenoid that will have a resistance of 6.00 (at 20°C) and produce a magnetic field of 4.00 10-2 T at its center when it carries a current of 4.80 A. estimate the length the solenoid should have
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. What are your reaction time
A hydrogen atom is in its n = 8 excited state. Determine, according to quantum mechanics, find the total energy (in eV) of the atom
A 22.5 g bullet is fired from a rifle. It takes 2.60 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
Two identical steel balls, each of mass 4.9 kg, are suspended from strings of length 23 cm so that they touch when in their equilibrium position. How high will the other ball rise
A charge of -3.80 nC and a charge of -6.00 nC are separated by a distance of 60.0 cm. Find out the position at which a third charge of +7.30 nC could be placed so that the net electrostatic force on it is zero.
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