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.
1.05 x 103s
1.05 x 105s
1.05 x 102s
1.05 x 104s
Correct answer is A
Power of heater = lvt = 2 x 240 x t
heat required to boil the water = Mct = 2.5 x 4.2 x 103 x (100.52) = 2.5 x 4. 2 x 103 x 48
2 x 240 x t = 2.5 x 4.2 x 103 x 48
∴ t = (2.5 x 4.2 x 103 x 48)/2 x 240
= 1050s or 1.05 x 103s
The thermometric property of a constant volume thermometer is?
change in volume
differential expansion
change in pressure
change in length
Correct answer is C
The thermometric property of a constant volume thermometer is change in pressure with temperature
If the relative density of gold is 19.2, the volume of 2.4kg of gold is?
8.00 x 10-3 m3
1.25 x 10-4 m3
1.92 x 10-4 m3
4.61 x 10-3 m3
Correct answer is B
R.D = (density of the subs)/density of water
19.2 =(P)/103; ∴P = 19.2 X 103
But Vol. = (Mass)/density = (2.4)/19.2 x 103
= 1.25 x 10-4 M3
At low humidity in an environment, the human skin is usually?
damp and rough
damp and smooth
dry and rough
dry and smooth
Correct answer is C
No explanation has been provided for this answer.
the cube will melt after a period of time
the cube will float
the cube will sink in water
the cube will rest at an equilibrium position in water
Correct answer is B
For the uniform cube 10cm volume = 10 x 10 x 10 = 103 cm3
Mass = 700g
∴ density = (Mass)/Volume = (700)/100 = 0.7gcm-3
since the density is less than the density of water, the cube will float