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Two particles with charges -3e and +4e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 7.62 x 10-13 meter apart. What is EPEfinal - EPEinitial, find which is the change in the electric potential energy?
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
You throw a ball toward a wall at speed 20 m/s and at angle theta=60 degrees above the horizontal. What is the angle when it hits the wall
A fighter jet landing on an aircraft is made to brake very quickly by means of cable that the plane connects to via a hook. Assume that a 21,000 lb jet touches down at 170 mph and its speed is reduced to zero in 240 ft Assuming constant deceler..
uniform chain of total mass m and total length l lies in a heap on a table. one end is pulled upwards at constant speed
As a bacterium swims through water it propels itself with its flagella so as to overcome the frictional drag forces and move at, more or less, constant velocity of 100 micrometers/s for periods of time. If the frictional drag force on a bacterium is ..
a long pipe of outer radius 3.40cm and inner radius 2.89cm carries a uniform charge density of 3.22mcm3. using gausss
Light travels a distance of 1.060 meter in 4.20 nanoseconds in a given substance. Find the index of refraction of this substance
a diesel engine weighing 20.5 ton 1 ton 1000 kg is at rest on a track inclined at an angle of 7.5deg. five cars each
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 58.0?. Dog A exerts a force of 260N , and dog B exerts a force of 320N
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, respectively. Estimate the maximum height the ball reaches
Evaluate the magnitude of the apparent weight of a 84 kg astronaut 4500 km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.1 m/s^2?
A kayaker needs to paddle north across an 85 m wide harbor. The tide is going out, creating a tidal current that flows to the east at 1.7 m/s. The kayaker can paddle with the speed of 3.0 m/s.
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