Physics - Study Mode

[#416] To convert temperature from Celcius to Kelvin scale, you must ________ the given temperature.
Correct Answer

(C) Add 273

Explanation

Solution: Take your Celsius temperature and add 273. Your answer will be in Kelvin.

[#417] 0°K is equivalent to
Correct Answer

(B) – 273°C

Explanation

Solution: 0°K is equivalent to – 273°C.

[#418] In very cold countries alcohol is used as a thermometric liquid because
Correct Answer

(C) Its freezing point is very low

Explanation

Solution: Alcohol has a freezing point as low as -117 o C. So it won't freeze even in very cold countries.

[#419] The modulus of elasticity for mild steel is approximately equal to
Correct Answer

(A) 210 kN/mm 2

Explanation

Solution: The modulus of elasticity for mild steel is approximately equal to 210 kN/mm 2 .

[#420] The Hooke's law is valid for
Correct Answer

(A) Only proportional region of the stress strain curve

Explanation

Solution: The Hooke's law is valid only when the stress is proportional to the strain, that is only in the proportionality limit.