Physics JAMB Past Questions

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1501

a guitar string is 75cm long. the wavelength of its fundamental note is

A. 75cm
B. 150cm
C. 37.5cm
D. 112cm
E. 50cm

View Answer & Discuss (10) JAMB 1978

1502

The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels

A. mainly through air
B. fainter in stretched string
C. faster through gases than in solids and liquids
D. with greater ease through a string than in air
E. none of the above is correct

View Answer & Discuss (10) JAMB 1978

1503

A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?