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Question1
A dolphin located in sea water at a temperature of 21?C emits a sound directed toward the bottom of ocean 148 m below.
How much time passes before it hears an echo? Imagine the speed of sound in sea water is 1530 m/s at this temperature. Reply in units of s
Question2
A gun shoots bullets that leave muzzle with the speed of 332 m/s. If a bullet is to hit a target 133 m away at the level of the muzzle, the gun must be aimed at a point above the target. How far above the aim is this point? (Ignore air resistance.)
Question3
A cannon with a muzzle speed of 1000 m/s is used to start an avalanche on a mountain slope. The aim is 2000 m from the cannon horizontally and 800 m above the cannon. At what angle (in degrees and three significant figures), above the horizontal, must the cannon be fired?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
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Illustrate the cause of the components accelerating from rest down the conveyor.
Calculate the dc voltage applied to the circuit.
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Determine the tension in each string
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Evaluate maximum altitude?
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