Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

2,621.

Which of the following instruments has a pure tone?

A.

guitar

B.

vibrating strings

C.

tuning fork

D.

siren

Correct answer is C

No explanation has been provided for this answer.

2,622.

A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms-1. At what interval does the wave crest reach the boat?

A.

2500.00s

B.

75.00s

C.

4.00s

D.

0.25s

Correct answer is C

Distance between the boat and crest = 100m

time = \(\frac{100}{25}\)

= 4sec

2,623.

A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is

A.

60.0ms-1

B.

6.0ms-1

C.

1.5ms-1

D.

0.6ms-1

Correct answer is D

V = F\(\lambda\)

= 2 x 0.3

= 0.6ms-1

2,625.