If the accelerating plates are 1.05 apart, and have a potential difference of 2.70 104 , find the change in electric potential energy for an electron that moves from one accelerating plate to the other.

A 48-kg block is suspended from a uniform chain that is hanging from the ceiling. The mass of the chain itself is 23 kg, and the length of the chain is 1.5 m.

A speeding motorist traveling 140 km/h passes a stationary police officer. The officer immediately begins pursuit at a constant acceleration of 12.0 km/h/s (note the mixed units). (a) How much time will it take for the police officer to reach the speeder, assuming that the speeder maintains a...

"Three equal point charges, each with charge 1.5 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is the electric potential energy of the system? (Take as zero the potential energy of the three charges when they are infinitely far...

A stone is thrown upward at an angle. What happens to the horizontal component of its velocity as it rises? As it falls?

If the moon were placed at twice its current distance from the Earth, how large would it have to be so that total solar eclipses could still occur?

Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of -12.0 m/s. Ignore air resistance. Determine (a) how long it takes the first rock to hit the ground and (b) at...

The cannonball is fired at a speed of 52 m/s and at an angle of 28 . A second cannonball that was accidentally dropped hits the moat below in 1.6 s. (a) How tall is the top of the castle wall? (b) How long is the fired cannonball in the air (c) How far from the castle wall does the fired...

Two point charges are placed on the x axis. (Intro 1 figure) The first charge, = 8.00 , is placed a distance 16.0 from the origin along the positive x axis; the second charge, = 6.00 , is placed a distance 9.00 from the origin along the negative x axis.

1. The height of a certain waterfall is 33.1 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls? ________ m/s 2. On earth, two parts of a space probe weigh 15500 N and 8900 N. These parts...