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.
15.0s
18.0s
22.5s
30.0s
45.0s
Correct answer is C
\(\frac{1}{16} = (\frac{1}{2})^n\)
\((\frac{1}{2})^4 = (\frac{1}{2})^n\)
\(n = 4\)
90 secs = 4 half lives
1 half life = \(\frac{90}{4}\) secs
= 22.5 secs
0.25ms-1
0.50ms-1
1.00ms-1
2.00ms-1
4.00ms-1
Correct answer is C
No explanation has been provided for this answer.
232
450
550
2750
11000
Correct answer is D
No explanation has been provided for this answer.
charges generated by friction in the tanker are conducted to the earth
chain vibrates in resonance with the tanker’s engine
heat generated by friction in the engine is conducted to the earth
petrol tanker is balanced on the road
tanker does not exceed a certain speed limit
Correct answer is A
No explanation has been provided for this answer.
36.9°
41.3°
48.8°
49.2°
51.4°
Correct answer is C
critical angle formula = \(sin^{-1}\) \(\frac{n_2}{n_1}\)
→ \(sin^{-1}\) \(\frac{1}{1.33}\) = \(sin^{-1}\) 0.7518
= 48.75º