Which of the following instruments is used to measure relative humidity?
Hydrometer
Barometer
Manometer
Hypsometer
Hygrometer
Correct answer is E
No explanation has been provided for this answer.
1.17 x 107 Nm-2
6.80 x 105Nm-2
1.17x105Nm-2
1.03 x 105Nm-2
1.36 x104 Nm-2
Correct answer is C
Pressure at a depth for fluid with constant density such as mercury is given as
\(p = p_{0} + \rho hg\)
where \(p_{0}\) = atmospheric pressure.
\(p_{0} = \rho hg =13600 \times \frac{76}{100} \times 10\)
= \(103,360 Nm^{-2}\)
\(p = 103,360 + (13600 \times \frac{10}{100} \times 10)\)
\(p = 103,360 + 13,600\)
\(p = 116,960 Nm^{-2} \approxeq 1.17 \times 10^{5} Nm^{-2}\)
Steam is at a higher temperature than boiling water
Steam possesses greater heat energy per unit mass than boiling water
Steam spreads more easily over a wider area of the skin man boiling water
Steam penetrates more deeply into the skin than boiling water
the specific latent heat of vaporization is released in changing from boiling water to steam
Correct answer is B
No explanation has been provided for this answer.
A gas which obeys Charles’ law exactly has a volume of 283cm3 at 10oC. What is its volume at 30oC?
142cm3
293cm3
303cm3
566cm3
849cm3
Correct answer is C
Using Charles law:
V1/T1 = V2/T2;
(283 * 303) / 283
V2= 303
Which of the following colours of surfaces will radiate heat energy best?
Red
White
Black
Yellow
Blue
Correct answer is C
No explanation has been provided for this answer.