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.
4200J
2,260,OOOJ
9,040,000J
9,380,000J
Correct answer is C
Heat by water = mc\(\theta\)
Heat by steam = mc\(\theta\) + mL
Difference = mL = 4 x 2,260,000
= 9,040,000J
2.0036m
2.0018cm
2.1800
2.0360m
Correct answer is A
\(\alpha\) = \(\frac{L_2 - L_1}{L_1 \times \Delta \theta}\)
18 x 10-6 = \(\frac{L_2 - 2}{2\times 100}\)
L = 2.0036m
25.0oC
50.0oC
66.7oC
75.0oC
Correct answer is D
100oC ... 90oS
\(\theta\)oC ... 60oS
0oC ... 30oS
\(\frac{\theta - 0}{100 - 0}\) = \(\frac{60 - (-30)}{90 - (-30)}\)
\(\theta\) = 75oC
In which of the following is surface tension important?
the floating of a ship in water
the floating of a dry needle in water
the floating of a baloon in air
the diffusion of sugar solution across a membrane
Correct answer is B
A carefully placed small needle can be made to float on the surface of water even though it is several times as dense as water. If the surface is agitated to break up the surface tension, then needle will quickly sink.
1200m
6300m
7500m
13800m
Correct answer is A
Difference in pressure = 75 - 63
= 12cmHg
pressure = hge
difference in height = \(\frac{12}{10 \times \frac{0.00013}{13}}\)
= 1200m