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A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +53 N·m is applied to the wheel for 22 s, giving the wheel an angular velocity of +610 rev/min. The external torque is then removed, and the wheel comes to rest 120 s later. (Include the sign in your answers.) (a) Find the moment of inertia of the wheel. (b) Find the frictional torque, which is assumed to be constant.
q1. a 3000-kg blue truck travelling east collides and sticks to a 4000-kg orange truck travelling with a speed of 7.3
A 1000 kg artillery shell is fired from a battleship. What net external force is exerted on the artillery shell before it leaves the barrel of the gun
A tuning fork of unknown frequency makes six beats per second with a standard fork of frequency 481.0 Hz. What is the frequency of this fork
An unknown mass of tin is heated to a temperature of 202 C. It is placed into 200 g of water which is in a 100 g copper cup initially at 10 C. How much heat is gained by the cup and the water
One kilogram of water vapor (as an ideal gas) is filled in a frictionless piston-cylinder assembly. The piston can move freely in the cylinder and it is in surroundings of 1 atm. Determine the heat transfer for the process
The horizontal and vertical components of the initial velocity of a football are 20m/s and 30m/s respectively. To what maximum height doe the football rise
A parallel-plate air capacitor of area A=16.0cm2 and plate separation d=3.40mm is charged by a battery to a voltage 52.0V. how much additional charge will flow from the battery onto the positive plate
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min . It then reverses and goes at 80 km/h for 20min . What is the average velocity for the entire trip? What is the average speed for the entire trip?
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain.
A lava bomb is a missile composed of cooling, practicallysolid lava. You are a geologist, watching a volcano launch a lava bomb straight upward. find the Initial Speed at which the lava bomb got launched
A current of 16.0 mA is maintained in a single circular loop with a circumference of 3.70 m. What is the magnitude of the torque exerted on the loop by the magnetic field
You've been walking at a steady, and rope pulls up on the sled at a 21 angle. You estimate that the mass of the sled, with your friend on it, is 64 and that you're pulling with a force of 84.0.
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