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)/3
(2)/3
(1)/5
(2)/5
Correct answer is B
relative density = (weight of substance )/weight of equal volume of water = (4 - 2)/5 - 2 = (2)/3
When cold water is poured on a can containing hot water, the can collapses because the?
steam condeses and occupies the partial vacuum in the can
external air pressure counter balances the pressure within the can
steam expands to occupy the vacuum remaining in the can
external pressure becomes greater than the pressure within the can.
Correct answer is D
Cold water reduces the temperature of the hot water inside the can causing the contraction of the hot water. This reduces the pressure inside the can and the can collapses due to the external greater expression.
0.8
1.1
1.2
1.3
Correct answer is D
hlpl = hwpw
where, L =liquid and W = water
(pl)/pw = (hw)/hl = (26.5)/20.4
= 1.299
0.625 J
6.250 J
62.500 J
625.000 J
Correct answer is A
Energy stored in a spring = (1)/2 K e2 = (1)/2 x 500(0.05)2 = 0.625J
25.00
2.50
0.50
0.25
Correct answer is D
F = (mv)2/r = (100 x 5)2 = 250N
R = mg = 100 x 10 - 1000N
coefficient of friction,
µ = (F)/R = (250)/1000 = 0.25