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.
Which of the following has the highest surface tension?
cold water
soapy water
warm water
oily water
salty water
Correct answer is A
No explanation has been provided for this answer.
1.48ev
2.21ev
4.42ev
5.75ev
11.51ev
Correct answer is B
K.E = \(\frac{1}{2}\)mv2
E - W = 6.86 - 4.65
= 2.21ev
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant
0.035s-1
0.151s-1
0.347s-1
0.576s-1
1.386s-1
Correct answer is C
\(\lambda = \frac{0.693}{T_{\frac{1}{2}}} = \frac{0.693}{2}\)
= 0.347s-1
4.0 x 10-26J
4.0 x 10-21J
6.4 x 10-20J
3.2 x 10-15J
2.5 x 10-20J
Correct answer is D
E = \(\frac{1}{2}QV = \frac{1}{2} \times 1.6 \times 10^{-19} \times 40000\)
= 3.2 x 10-15J
source of the radiation
intensity of the radiation
detection device for the electrons
amplitude of the radiation
frequency of the radiation
Correct answer is E
No explanation has been provided for this answer.