Physics WAEC Past Questions

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1071

Control in nuclear reactors is effected with boron rods because rhe rods have the ability to

A. absorb electrons
B. absorb neutron
C. accelerate electrons
D. slow down neutrons

View Answer & Discuss (1) WAEC 2008

1072

A radioactive element has a decay constant of 0.077s^-1. Calculate its half-life

A. 13.0s
B. 9.0s
C. 5.1s
D. 0.5s

View Answer & Discuss WAEC 2008

1073

In which of the following states of matter do the molecules vibrate about their mean positions?

A. liquids only
B. solids only
C. liquids and gasses only
D. solids, liquids and gases

View Answer & Discuss WAEC 2009

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1074

Which of the following properties of a steel bar can be measured in terms of the dimension of length only?

A. weight
B. density
C. pressure
D. volume

View Answer & Discuss (2) WAEC 2009

1075

In a hydraulic press, a force of 40N is applied to the smaller priston of area 10cm². If the area of the larger piston is 200cm², calculate the force obtained

A. 800N
B. 500N
C. 80N`
D. 50N

View Answer & Discuss WAEC 2009

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Physics WAEC Past Questions

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