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The brakes of a truck cause it to slow down by applying a retarding force of 3.40 x 103 N to the truck over a distance of 920 m. What is the magnitude of the work done by this force on the truck? Is the work positive or negative? Why?
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
estimate the average power output on the way up. A speedboat moving at 39 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of -3.15m/s2 by reducing the throttle.
consider a thin wire bent into the shape of a ring of radius of 10 cm that carries a steady 2.0-A current
The charge flowing through a light bulb attached to a 12.0-V battery in 14.0 s is 30.0 C. What is the average power supplied by the battery during this process
A moving particle encounters an external electric field thatdecreases its kinetic energy from 9820 eVto 7470 eV as the particle moves fromposition A to position B. The electric potentialat A is -51.0 V, and the electricpotential at B is +28.9 V.Deter..
Light of wavelength 0.519 µm (in air) enters the water in a swimming pool. What is the wavelength of the light in water
A golf club strikes a 0.047-kg golf ball in order to launch it from the tee. With what speed does the ball leave the club
Two lightbulbs operate on the same potential difference. Bulb A has four times the power output of bulb B. What is the ratio of the current in bulb A to the current in bulb B?
A vertical tube 1.9cm in diameter and open at the top contains 4.0g of oil (density 0.82 g/cm^3) floating on 4.0g of water. Find the gauge pressure at the oil-water interface
a well-insulated electric water heater delivers 3.10106cal to its tank of water in 35.0 minutes. find the resistance of
A bicycle wheel of radius 0.70m is rolling without slipping on a horizontal surface with an angular speed of 4Pi rad/s, What is the tangential deceleration of the bicycle
Two cars have a head on collision. Both were traveling at 42m/s toward each other. Car A has a mass of 722 KG. Car B has a mass of 848KG. After impact, car A is moving backward at 2 m/s. What is car B's velocity after impact.
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