Two transparency sheets are rubbed with tissue paper and then the two transparency sheets are held up near each other. This experiment demonstrates that
A) similarly-charged objects attract each other.
B) similarly-charged objects exert magnetic forces on each other.
C) differently-charged objects attract each other.
D) differently-charged objects repel each other.
E) similarly-charged objects repel each other.
E
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The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the corners of the square
What is the potential (relative to infinity) at the center when each of the other corners is also contains a point charge of +Q? A) 12 V B) 9.0 V C) 3.0 V D) 0 V
A 0.50 kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the mass is at the highest point of the circle the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
a. 21 N b. 11 N c. 16 N d. 26 N e. 36 N
A ball is projected upward at time t = 0.0 s, from a point on a roof 90 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is if air resistance is negligible
The time when the ball strikes the ground is closest to A) 9.4 s B) 9.0 s C) 8.7 s D) 9.7 s E) 10 s
Larger planets (higher mass) in the solar system have higher orbital speeds because they are attracted more strongly by the Sun.
Answer the following statement true (T) or false (F)