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.
76.0min
35.0min
21.0min
2.9min
Correct answer is B
Elect. energy = heat energy
IVt = mL
20 X 12 t = 1.5 x 336 x 103
t = 2100 sec ; t = 35mins.
1200cm3
1378cm3
4320cm3
4629cm3
Correct answer is A
\(\frac{V_1P_1}{T_1}\) = \(\frac{V_2P_2}{T_2}\)
\(\frac{70 \times 1200}{7 \times 273}\) = \(\frac{75 \times V_2}{27 + 273}\)
V2 = 1200cm3
A column of air 10.0cm long is trapped in a tube at 27oC. What is the length of the volume at 100oC?
12.4cm
13.7cm
18.5cm
37.0cm
Correct answer is A
\(\frac{V_1}{T_1}\) = \(\frac{V_2}{T_2}\)
\(\frac{10\times A}{27 + 273}\) = \(\frac{L\times A}{100 + 273}\)
L = 12.43cm
30k
243k
300k
3003k
Correct answer is B
100\(\theta\) .... 875mm
0\(\theta\) ....325mm
\(\theta\) .... 190mm
\(\frac{0 - \theta}{100 - \theta}\) = \(\frac{325 - 190}{875 - 190}\)
\(\theta\) = -25oC
= 243k
30cm
40cm
20cm
2cm
Correct answer is C
Mw displaced = 40g
density = \(\frac{mass}{\text{area x height}}\)
I = \(\frac{40}{2\times h}\)
h = 20cm