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A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 72 cm and is wrapped around the top at a place where its radius is 2.3 cm. The thickness of the string is negligible. The top is initially at rest. Someone pulls the free end of the string, thereby unwinding it and giving the top an angular acceleration of +10 rad/s2. What is the final angular velocity of the top when the string is completely unwound?
A sonar generator on a submarine on the ocean surface produces periodic ultrasonic waves at a frequency of 2.50 MHz. How deep is the ocean floor
A 8.7 kg freight car is coasting at a speed of 38.8 m/s along a straight track when it strikes a 13.5 kg stationary freight car and couples to it. What will be their combined speed after impact
A 30-06 caliber hunting rifle fires a bullet of mass 0.0122 kg with a velocity of 247 m/s to the right. The rifle has a mass of 3.2 kg. What is the recoil speed of the rifle as bullet leaves the rifle.
A flat sheet of sodium chloride has a thickness of 2.50 cm. It is on top of a flat sheet of fused quartz that has a thickness of 1.26 cm, how far (in cm) would it have traveled in a vacuum
When a 4.0 µF capacitor is connected to a generator whose rms output is 32 V, What is the frequency of the source
Two lightbulbs operate on the same potential difference. What is the ratio of the current in bulb A to the current in bulb B
A large oak tree produces 2.2 metric tons of wood over a 50 year growth lifespan. find the tree's efficiency for converting solar energy to wood heating value
An unknown material has a normal melting/freezing point of -20.6 °C, and the liquid phase has a specific heat capacity of 143 J/(kg C°). What is the latent heat of fusion of the unknown material
A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater.
A laser beam produces light of wavelength 632.8 nm in vacuum. what is the index of refraction of the syrup solution
A 0.50 kg block rests on the icy surface of a frozen pond, which you can assume to be frictionless. what is the minimum uncertainty in the block's speed
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.25 s. At the end of this time, Find the total displacement of the boat
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