Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
weight
density
pressure
volume
Correct answer is D
No explanation has been provided for this answer.
In which of the following states of matter do the molecules vibrate about their mean positions?
liquids only
solids only
liquids and gasses only
solids, liquids and gases
Correct answer is B
No explanation has been provided for this answer.
A radioactive element has a decay constant of 0.077s-1. Calculate its half-life
13.0s
9.0s
5.1s
0.5s
Correct answer is B
\(t_{\frac{1}{2}} = \frac{0.693}{\lambda} = \frac{0.693}{0.077} = 9s\)
Control in nuclear reactors is effected with boron rods because rhe rods have the ability to
absorb electrons
absorb neutron
accelerate electrons
slow down neutrons
Correct answer is B
No explanation has been provided for this answer.
Nuclear fission is preffered to nuclear fusion in the generation of energy because
very high temperature are required for fusion
the raw materials for fusion are easily obtained
energy obtained from fusion is relatively small
the by-products of fusion is very dangerous
Correct answer is C
No explanation has been provided for this answer.