NEET Physics: Questions 1439 - 1442 of 2098

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Question number: 1439

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

Flask is filled up to a mark with 40 cc of mercury at 20°C. If the flask and contents are heated to 30°C, how much mercury will be above the mark? (α for glass is 9 × 10 -6 /°C and coefficient of real expansion of mercury is 180 × 10 -6 /°C

Choices

Choice (4) Response

a.

0.0708 cc

b.

0.0005

c.

0.8500 cc

d.

0.0153 cc

Question number: 1440

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The coefficient of volumetric expansion of mercury is 18 × 10 -5 / o C. A thermometer bulb has a volume 10 -6 m 3 and cross section of stem is 0.004 cm 2. Assuming that bulb is filled with mercury at 0°C then the length of the mercury column at 100°C is

Choices

Choice (4) Response

a.

9.2 mm

b.

4.5 cm

c.

18.8 mm

d.

7.4 cm

Question number: 1441

» Thermodynamics » Concept of Temperature

MCQ▾

Question

One mole of an ideal gas at an initial temperature of TK does 6 R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 53 , the final temperature of gas will be

Choices

Choice (4) Response

a.

(T2A)K

b.

(T+A)K

c.

(T+2.4)K

d.

(T4)K

Question number: 1442

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A glass flask of volume one liter at 0° C is filled, level full of mercury at this temperature. The flask and mercury are now heated to 100 0 C. How much mercury will spill out, if coefficient of volume expansion of mercury is 1.82 × 10 -4 /°C and linear expansion of glass is 0.1 × l0 -4 /ºC?

Choices

Choice (4) Response

a.

2.12 cc

b.

21.2 cc

c.

15.2 cc

d.

1.52 cc

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