Jamb Physics 1987 Past Questions and Answers

Question 21:

• JAMB 1987

Calculate the amount of heat required to convert 2kg of ice at 2^oC to water at 0^oC. [specific heat capacity of ice = 2090Jkg^-1oC^-1, specific latent heat of fusion of ice = 333kJkg^-1]

A. 666J
B. 8360J
C. 666 000J
D. 674 360J

Question 22:

• JAMB 1987

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

Question 23:

• JAMB 1987

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

Question 24:

• JAMB 1987

Which of the following instruments has a pure tone?

A. Guitar
B. Vibrating strings
C. Tuning fork
D. Siren

Question 25:

• JAMB 1987

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?

A. 1
B. 2
C. 3
D. 4