MCAT UHS Past Paper

Q: What is it that we use to calculate the speeds of distant stars and galaxies?

(a) :  Doppler Effect
(b) :   Interference
(c) :   Beats
(d) :  All of the above
Answer:  Doppler Effect
Explanation:  

Q: When the length of a simple pendulum is doubled, find the ratio of the new frequency to the old
frequency?

(a) :  1/4
(b) :  1/2
(c) :   √2
(d) :   1/√2
Answer:   1/√2
Explanation:  

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