A motorcyclist, passing a road junction, moves due west for 8 s at a uniform…
A motorcyclist, passing a road junction, moves due west for 8 s at a uniform speed of 5ms-1.…
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The time rate of change of displacement is known as
The time rate of change of displacement is known as A. speed B. velocity C. impulse D. acceleration…
Palm oil from a bottle flows out more easily after it as been heated because…
Palm oil from a bottle flows out more easily after it as been heated because the A. molecules…
A body weighing 10N moves with a speed of 5ms-1 in a horizontal circular path…
A body weighing 10N moves with a speed of 5ms-1 in a horizontal circular path of radius 5m.…
The force between molecules of the same substance is termed
The force between molecules of the same substance is termed A. elastic force B. repulsive force C. cohesive…
A net force of magnitude 0.6N acts on a body of mass 40g, initially at…
A net force of magnitude 0.6N acts on a body of mass 40g, initially at rest. Calculate the…
Which of the following particles/rays do not originate from the nucleus of an atom?
Which of the following particles/rays do not originate from the nucleus of an atom? A. Alpha particles B.…
The count rate of an alpha-particle source is 400 per minute. If the half-life of…
The count rate of an alpha-particle source is 400 per minute. If the half-life of the source is…
Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?
Which of the following is used in a nuclear reactor to slow down fast-moving neutrons? A. Carbondioxide gas…
What is the decay constant of a radioactive element whose half-life is 3 seconds
What is the decay constant of a radioactive element whose half-life is 3 seconds A. 0.132s-1 B. 0.23s-1…