Which describes what happens when a balloon is rubbed with a wool cloth?

a.
electrons move from the atoms in the balloon to the atoms in the cloth, causing the cloth to have a negative charge.

b.
everyday objects do not have electric charges, so neither the balloon nor the cloth can gain or lose electrons.

c.
electrons move from the atoms in the cloth to the atoms in the balloon, causing the balloon to have a negative charge.

d.
electrons are shared equally between the atoms of the balloon and the atoms of the cloth, making both electrically neutral.

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What part of the ear is names after tools, such as the hammer and the anvil?

Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r