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.
The relationship between L and the wavelength I of the stationary wave is
2L = \(\lambda\)
L = \(\lambda\)
L = \(\frac {\lambda}{3}\)
4L = 3 \(\lambda\)
Correct answer is D
L = - \(\lambda\) \(\Rightarrow\)4L = 3 \(\lambda\)
200g of water at 90°C is mixed with 100g of water at 30°C. What is the final temperature?
50oC
60oC
70oC
80oC
Correct answer is C
Heat lost = heat gained
200 x c x (90 - \(\theta\))= 100\(\times\) c \(\times\) (\(\theta - 30\))
Dividing through by 100c, we have
2(\(90 - \theta\)) = (\(\theta - 30\))
simplifying, we have
\(\theta\) = 70°
When the volume of a given mass of gas is halved and its temperature doubled, the pressure
remains constant
increases by a factor of 4
increases by a factor of 3
decreases by a factor of 4
Correct answer is B
\(\frac{P_1V_1}{T_1}\) = \(\frac{P_2V_2}{T_2}\)
V1 = 2V2 and T2 = 2T1
\(\frac{P_1\times 2V_2}{T_1}\) = \(\frac{P_2\times V_2}{2T_1}\)
P2 = 4P1
2.0 x 102K-1
2.0 x 102K-1
5.0 x 10-3K-1
2.0 x 10-5K-1
Correct answer is D
a = \(\frac{1.36}{800 \times (95 - 10)}\)
= 2.0 x 10-5K-1
The thermometric properties of the thermocouple is that is
e.m.f. changes with temperature
resistance changes with temperature
volume changes with temperature
pressure changes with resistance
Correct answer is A
No explanation has been provided for this answer.