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Two spaceships pass each other, travelling in opposite directions. The speed of ship B as measured by a passenger in ship A is 0.86c. This passenger has measured the length of ship A as 108 m and determines that ship B is 36 m long. What is the length of ship A as measured by a passenger in ship B?
suposse that a ferrari and a porsche begin a race with a moving start and each moves with constant speed. one lap of
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
A cylinder with a diameter of 23 cm rolls with an angular speedof 0.40 rad/s on a levelsurface. If the cylinder experiences a uniform tangentialacceleration of 0.012m/s2 without slipping until itsangular speed is 1.41 rad/s, through how many compl..
If a positron (a positively charged particle with the mass of the electron) and a proton go through the same potential difference, By what factor is the wavelength shorter
A model car is propelled by a cylinder of carbon dioxide gas. The cylinder emits gas at a rate of 4.5 grams/second with an exit speed of 80.0 m/s. what is the car's initial acceleration
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 445 Hz, calculates the speed of the train
a rock of mass 45kg accidentally breaks loose from the edge ofa cliff and falls straight down. evaluate the magnitude of the acceleration of the rock
A train is travelling up a 4.40 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the car to come to rest? How far does the car travel.
Construction cranes are able to balance heavy loads by using a counterweight. The crane operator can slide the entire torque arm horizontally in order to balance the load.
A 0.145 kg baseball pitched at 39.0 m/s is hit on a horizontalline drive straight back toward the pitcher at 52.0 m/s. calculate the average force between the bat and ball during contest
A container holds 1.4 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.2x10-3 kg bullet with a speed of 780 m/s
A ball with a mass of 25 grams is dropped from aledge 908 meters above the ground. What is the potential energy ofthe ball before it is dropped
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