1.You are going to get on a spaceship going to the moon and need to bring a clock with you. The worst clock to bring is:

Group of answer choices

A.spring balance.

B.pendulum.

C.digital.

D.quartz.

2.Tall buildings such as Taipei 101 hangs a heavy swinging pendulum as:

Group of answer choices

A.tourist attraction.

B.damping to oscillation.

C.a clock.

D.spiritual item.

3.Compare sound wave in air and water wave in ocean. The two types are similar in:

Group of answer choices

A.frequency.

B.speed.

C.both traveling.

D.both transverse.

4. If heartbeats are vibrations, the heart rate is the wave:

Group of answer choices

A.speed.

B.length.

C.frequency.

D.amplitude.

5.When a person wants to run fast, she should have her arms _____ her body.

Group of answer choices

A.out of phase with

B.close to

C.at right angle to

D.extended out from

Answer all questions correctly.