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.
24 years
20 years
10 years
2 years
Correct answer is B
Given amount remaining = \(\frac{1}{64}\)
= \(\frac{1}{64} = \frac{1}{(2)^{6}}\)
\(\therefore\) = \(\frac{120 \text {years}}{6}\) = 20 years
\(\Rightarrow\) T\(\frac{1}{2}\) = 20 years
6630.0V
663.0V
66.3V
6.6V
Correct answer is C
Given f = 1.6 x10\(^{16}\)H\(_{3}\), h = 6.63 x 10\(^{-39}\)Js
e = 1.6 x 10\(^{-19}\)C, V = ?
V = \(\frac{w}{e} = \frac{hf}{e}\) = \(\frac{1.6 \times 10^{16} \times 6.63 \times 10^{34}}{1.6 \times 10^{-19}}\)
= 66.3V
30V
40V
50V
70V
Correct answer is B
AT resonance; X\(_{L}\) = X\(_{c}\)
\(\therefore\) = V\(_{L}\) = V\(_{c}\) = 40V
530000J
23200J
17200J
130000J
Correct answer is D
H = mc\(\bigtriangleup\theta\) + mL
H = ?
m = 50g, c = 4.23J/gk,L = 2260, \(\bigtriangleup\theta\) = 80ºC
H = 50 [4.23 x 80 + 2260]
= 129920 \(\approx\) 130,000J
680m
170m
34m
85m
Correct answer is D
V = \(\frac{2d}{t}\)
v = 340ms\(^{-1}\)
t = 0.5s
d= ?
d = \(\frac{2d}{2} = \frac{340 \times 0.5}{2}\) = 85m