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Four point charges have the same magnitude of 2.57 10-12 C and are fixed to the corners of a square that is 4.20 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
Find out all intermediate results to at least four-digit accuracy to minimize roundoff error. m/s2 direction 3° from the direction of velocity towards center of the circle
Consider a person on the moon who launches herself into a satnding broad jump at 45 degrees. What is the range of the jump
A baseball player hits a ball towards the outfield with an initial velocity of 76.0 m/s at an angle of 45 relative to the ground. The outfield is 118 m away and is 4.0 m tall.
You throw a bouncy ball directly down toward the ground. When it leaves your hand, 1 m above the ground, it is moving at 5 m/s. What is the ball's maximum height after it bounces
The spheres are given the same electric charge Q and it is found that they come to equilibrium when each string is at an angle of 5 with the vertical. Each string is 30 cm long.
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the earthbound person's voice was so loud in the astronaut's space helmet, Calculate the distance from Earth to the Moon
If the patch is 78 meters wide and the average force of air resistance on the skier is 179 newtons, explain how fast is she going after crossing the patch?
The ball leaves his racket with a speed of 16.0 m/s at an angle 5.5 degrees above the horizontal. The horizontal distance to the net is 7.0 m and the net is 1.0 m high. Explain by how much did the ball clear the net?
Suppose an electron is accelerated from rest through a difference in potential of V = 4.6 V. Find the speed of the electron after the collision
A rock is tossed straight up with a velocity of 14 m/s When it returns, it falls into a hole 10m deep.
A 1200-turn coil of wire that is 2.0cm in diameter is in a magnetic field that drops from 0.14T to 0 T in 11ms. What is the emf of the coil
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