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A uniform electric field has a magnitude 330 N/C and is directed along the +y-axis. If a 5.50 uc charge moves from the origin (x,y) = (0.0xm, 0.0cm) to the point (x,y) = (-15.0 cm, -30.0cm), what is the change in potential energy for this charge?
The heat of vaporization of ethyl alcohol is about 200 cal/g. If 2.8kg of it were allowed to vaporize in the refrigerator, how many grams of ice would be formed from 0 °C water.
A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 521 N. As the drawing shows, Find the tensions in the rope to the left and to the right of the mountain climber
Given an isothermal expansion of gas from 1.0 to 2.0 cubic meters in a piston-cylinder arrangement where pressure varies according to P= 1.2 atm -.062 atm/ m^3 V, How much thermal energy was transferred
Identify the magnitude and direction of the electric field at a point midway between a -8.0 uC and a +5.8 uC charge 8.0 cm away. Assume no other charges are nearby.
Find out the position at which a third charge can be placed.
At the instant of engine burnout, the rocket has risen to 52 m and acquired a velocity of 40 m/s. The rocket continues to rise in unpowered flight, reaches most height and falls back to the ground.
How much time is necessary for the torso to come to rest
Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 450.0 N of tension. String B has a diameter of 1.2 mm and is under a tension of 800.0 N. Find the ratio of the wave speeds, va/vb, in these two strings.
An air molecule is moving at a speed of 438m/s. How many meters would molecule move during 7ms (milliseconds) if it didn't collide with any other molecules.
A rocket ship at rest in space gives a short blast of its engine, firing 90 kg of exhaust gas out the back end with an average velocity of 700 m/s.
A 405 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 2.7 meters. What is the speed of sound in the substance
A child in danger of drowning in a river is carried downstream by a current that flows uniformly with a velocity of 2.0 meters per second.
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