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A flight attendant pulls her 70.0 N flights bag a distance of251 m along a level airport floor at a constant speed. The force she exerts is 31.0 N at an angle of 52.0° above the horizontal.
1. Discover the work she does on the flight bag
2. Discover the work done by the force of friction on the flight bag.
3. Find the coefficient of kinetic friction among the flight bag and the floor.
The battery charger for an MP3 player contains a step-down transformer with a turns ratio of 1:27, What voltage does the secondary coil of the transformer provide
Derive the Gauss lens equation for a curved surface and use it to obtain the Lens maker’s equation for two curved surfaces. What assumptions did you make in these derivations?
Two musics students are tuning their guitars before arehearsal. If one middle C (262Hz) and the other plays a C sharp(277Hz), what will the frequencty of the bear be
Find the drift velocity of conduction electrons in a gold wire of diameter 1.03 mm when a current of 0.221 A flows in it. The density of conduction electrons in gold is 5.90 X 10^28 m-3
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the final speed of an electron released from rest at the negative plate
a skateboarder moving at v 4.8 ms along a horizontal section of a track that is slanted upward by 48deg above the
A 70- kg child sits in a swing suspended with 3.3- m-long ropes. determine the speed the child will have at the bottom of the arc
Water flows straight down from an open faucet. The cross sectionalarea of the faucet is 1.8x10-4 m2, and thespeed of the water is 0.85 m/s as it leaves the faucet. Ignoringair resistance, find the cross-sectional area of the water streamat a point 0...
An LC circuit is built with a 10mH inductor and an 8.0pF capacitor. The capacitor voltage has its maximum value of 45V at t=0s. How long is it until the capacitor is first fully discharged
A block of mass 12.0kg slides from rest downa frictionless 35.0 degree incline and is stopped by a strongspring with k=3.00x10 the 4th N/m. how far has the spring been compressed
A total of 3.02 106 electrons are placed on an initially uncharged wire of length 1.45 m. What is the magnitude of the electric field a perpendicular distance of 0.400 m away from the midpoint of the wire?
A golf club has a lightweight flexible shaft with a heavy block of wood or metal (called the head of the club) at the end. A golfer making a long shot off the tee uses a driver, What is the speed of the club head immediately after the collision
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