Copernicus was the first to propose that Earth moved around the sun
Indicate whether the statement is true or false
F
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Contrast the Oort Cloud and the Kuiper Belt
What will be an ideal response?
A 1.0 ?F capacitor has a potential difference of 6.0 V applied across its plates. If the potential difference across its plates is increased to 8.0 V, how much ADDITIONAL energy does the capacitor store?
A) 14 ?J B) 28 ?J C) 2.0 ?J D) 4.0 ?J
Two masses collide and stick together. Before the collision one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?
a. Yes, if the less massive particle is the one initially at rest. b. Yes, if the more massive particle is the one initially at rest. c. Yes, if the two particles have the same mass. d. No, kinetic energy is always lost is such a collision.
In a museum exhibit of a simple pendulum, a very small but dense 6.0-kg ball swings from a very light 2.5-m wire
The ball is released from rest when the pendulum wire makes a 65° angle with the vertical, and it swings in a circular arc with no appreciable friction or air resistance. What is the tension in the wire just as the ball swings through its lowest position? A) 11 N B) 59 N C) 68 N D) 130 N E) 0 N