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.
4.57 minutes
5.02 minutes
7.30 minutes
10.04 minutes
Correct answer is A
t = \(\frac{MC\theta}{2} = \frac{1.5 \times 4200 \times 50}{5 \times 230}\)
= 273.91s or 4.57 mins
273m3
546m3
8193
10923
Correct answer is B
\(V_2 = V_1(B\theta + 1) = 273 (\frac{1}{373} \times 273 + 1)\)
= 546m3
20\(\alpha\)
200\(\alpha\)
2000\(\alpha\)
20000\(\alpha\)
Correct answer is A
\(L_2 - L_1 = \alpha_1 (\theta_2 - \theta_1) = \alpha \times 0.5 \times 40 = 20 \alpha\)
The design of the thermostat of an electric iron is based on the
emmision of electrons from metals when heated
increase in size of metals when heated
increase in the density of metals when heated
change in the mass of metals when heated
Correct answer is B
No explanation has been provided for this answer.
Which of the following equations for the efficiency of a machine is correct?
Efficiency = \(\frac{\text{Velocity Ratio}}{\text{Mechanical Advantage}}\) x 100%
Efficiency = \(\frac{input}{output}\) x 100%
Efficiency = \(\frac{\text{load distance}}{\text{effort distance}}\) x 100%
Efficiency = \(\frac{\text{Mechanical Advantage}}{\text{Velocity Ratio}}\) x 100%
Correct answer is D
No explanation has been provided for this answer.