A. When a rock is dropped into a large puddle, A. the energy of the waves is gre

Question

A.

When a rock is dropped into a large puddle,

A. the energy of the waves is greatest at the center of the puddle.

B. the energy of the waves is greatest at the edge of the puddle.

C. the energy of the waves is greatest between the center and edge of the puddle.

D. the energy of the waves doesn't change as they move away from the center of the puddle.

One more

B.

A magnetic resonance imager (MRI) is used in hospitals to observe internal organs. The patient being imaged

cannot have anything that will be attracted to the imager's powerful magnet. Which might cause a patient the most

problems?

A. an aluminum belt buckle

B. dental fillings made from silver and mercury

C. a brass zipper

D. a steel replacement joint

Explanation / Answer

A.greatst at center of puddle

B.dental fillings of silver and mercury

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