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A moving particle encounters an external electric field that decreases its kenetic energy from 9640 eV to 6490 eV as the particle moves from position A to position B. The electric potential at A is -55.5 V, and the electric potential at B is +24.3. Determine the charge of the particle. Include (+ or -) in answer.
A uniform plank, 10.0 m long and weighing 200 N, is supported horizontally by a brick at one end and an egg at the other. What is the force exerted on the plank by the brick
a moon circles distant planet with an orbit radius 6.93*10^8 m and period of 4.22 days around the planet. From this information compute the mass of this planet
The spacecraft's mass is 291 kg and the thrust (force) of the rocket engines is 59 N. If the speed of the spacecraft should be decreased by 128 m/s, how long the engines should be fired. (Ignore the change in mass as a result of the rocket engines..
area ratio. i know that at a temperature of 3000k the power was 4.59 x106 wm2 and at 6000k the power was 7.35 x107 wm2
Light of wavelength 624 nm is incident perpendicularly on a soap film suspended in air. Assume the soap film has n = 1.33. What are the smallest two thicknesses of the film for which reflections from the film undergo fully constructive interference?
In an experiment designed to measure the strength of a uniform magnetic field produced by a set coils, What is the magnitude of the magnetic field
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
Suppose a distant world with surface gravity of 6.64 m/s2 has an atmospheric pressure of 8.52 104 Pa at the surface. What force is exerted by the atmosphere on a disk-shaped region 2.00 m in radius at the surface of a methane ocean
Suppose a modern power plant has a 1.00-GW electric power output at 500 V. It is stepped up to a transmission voltage of 750 kV in a series of five identical transformers. What is the current in the high voltage delivery lines
Two equal masses, one initially at rest and the other traveling to the right at a speed of 3.6 m/s, elastically collide. Determine the final speed of both masses
Motor M draws in the cable with an acceleration of 4 ft/s^2, measured relative to the 200 lb mine car. Determine the acceleration of the car and the tension in the cable. avoid the mass of the pulleys.
Three equal point charges, each with charge 1.10 , are placed at the vertices of an equilateral triangle whose sides are of length 0.200. Calcualte the electric potential energy of the system?
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