Physics 1978 JAMB Past Questions

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An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?

A. The water level remains the same
B. there is a drop in the level of water in the glass due to condensation on its outside
C. the water in the glass overflows
D. the level of water drops because melted ice occupies less volume
E. none of the above is correct

View Answer & Discuss (30) JAMB 1978

A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms^-1. The recoil speed of the machine gun is

A. 0.5 msec^-1
B. 1.5 msec^-1
C. 1 msec^-1
D. 2 msec^-1
E. 4 msec^-1

View Answer & Discuss (7) JAMB 1978

mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not wet glass iv. it has a high vapour pressure v. it has a high boiling point. which of the above statements are true?