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.
One valid assumption of the kinetic theory of gasses is the
the molecules of a gas are constantly in a state of motion and the number of collision remains constant
the number of molecule of gas increases with increasing pressure
as the temperature increases, the number of collision made by the gas molecule remains constant
the molecules of gas are all identical and are very small in size
Correct answer is D
No explanation has been provided for this answer.
A vapour is said to be saturated when
more molecules return to the liquid than the amount that left it
a dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
the vapour pressure is equal to the atmospheric pressure
all molecules are moving with the same speed in all directions at a given temperature
Correct answer is B
No explanation has been provided for this answer.
200g
300g
320g
400g
Correct answer is A
Heat lost = Heat gained
mc\(\theta\) = mL
m x 4200 x 17 = 42 x 3.4 x 105
therefore, m = 200g
50
5
5/4
1/5
Correct answer is B
Heat energy = Electrical energy
mc\(\theta\) = power x time
0.6 x c x (100 - 25) = 500 x t1
and, 0.2 x c x (100 - 10)= 100 x t2
\(\frac {t_1}{t_2}\) = 5
33oC
60oC
87oC
114oC
Correct answer is C
\(\frac {V_1}{T_1}\) = \(\frac {V_2}{T_2}\)
\(\frac {100}{27 + 273}\) = \(\frac {120}{T + 273}\)
T = 87oC