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By what factor does the resistance of a copper wire change if its length doubles and its diameter triples? (If the resistance doubles, enter "2"; if it decreases by a factor of three, enter "1/3", etc.)
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. What is the change in length of the nail
q1. a volkswagen is stopped at a traffic light. when the light turns green the driver accelerates so that the car is
Calculate the pressure of the blood in the brain and in the feet of a pearson when standing. The average pressure of the blood in the heart is 1.3×104N/m2 above atmospheric pressure
A wave traveling along the x axis is described mathematically by the equation y = 0.17sin(8.1?t + 0.82?x), What is the speed of the wave
Two polarizers are out of alignment by 22.1°. If light of intensity 1.00 W/m2 and initially polarized halfway between the polarizing angles of the two filters passes through the two filters
An undamped 2.23-kg horizontal spring oscillator has a spring constant of 24.3 N/m. What is the oscillator\'s total mechanical energy as it passes through a position that is 0.785 of the amplitude away from the equilibrium position
The intensity level produced by a jet airplane at a certain location is 163 dB. Calculate the intensity of the sound wave generated by the jet at the given location.
A 6.0 multiplied by104 kg space probe is traveling at a speed of14000 m/s through deep space.Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 4.0 multiplied by 105N over a distance o..
In a particular x-ray tube, an electron approaches the target moving at 1.10 108 m/s. It slows down on being deflected by a nucleus of the target, compute the final speed of the electron
A 76 g, 31 cm long road hang vertically on frictionless horizontal axle passing through its center a 10 gram ball of clay travelling horizontally at 2.6m/s hits and stick to the very bottom tip of the rod. To what maximum angle, measured from ..
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe's diameter is 56.1 cm and the flow speed of the petroleum is 13.1 m/s. what is the pipe's diameter at the refinery
A constant 80-N force acts on a 5.0 kg box. The box initially is moving at 20 m/s in the direction of the force, Determine both the work done by this force
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