Properties of Solids & Liquids (NEET Physics): Questions 26 - 29 of 188

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Question number: 26

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The real coefficient of volume expansion of glycerin is 0.000597 per °C and linear coefficient of expansion of glass is 0.000009 per °C. Then the apparent volume coefficient of expansion of glycerin is

Choices

Choice (4) Response

a.

0.00027 per °C

b.

0.00057 per °C

c.

0.000558 per °C

d.

0.00066 per °C

Question number: 27

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

2 kg of ice at - 20°C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg/°C and 0.5 kcal/kg/°C while the latent heat of fusion of ice is 80 kcal/kg

Choices

Choice (4) Response

a.

4 kg

b.

7 kg

c.

2kg

d.

6 kg

Question number: 28

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

An ice box used for keeping eatable cold has a total wall, area of 1 meter 2 and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 joule/meter °C is filled with ice at 0° C along with eatables on a day when the temperature is 30°C. The latent heat of fusion of ice is 334 × 10 3 joules/kg. The amount of ice melted in one day is (1 day = 86, 400 seconds)

Choices

Choice (4) Response

a.

1552 gm

b.

776 gm

c.

11520 gm

d.

7760 gm

Question number: 29

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

f between wavelength λ and λ + dλ, e λ and a λ be the emissive and absorptive powers of a body and E λ be the emissive power of a perfectly black body, then according to Kirchhoff’s law, which is true

Choices

Choice (4) Response

a.

eλ=aλ=Eλ

b.

eλEλ=aλ

c.

eλ=aλEλ

d.

eλaλEλ=constant

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