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PB1.Q.9.i

Authored by Nitin sir

Mathematics

6th - 9th Grade

PB1.Q.9.i
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11 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for calculating the heat (Q) gained or lost by a substance when its temperature changes?

Q = mL

Q = mcΔT

Q = CΔT

Q = L/m

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does 'c' represent in the formula Q = mcΔT?

Specific latent heat

Specific heat capacity

Heat capacity

Thermal conductivity

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the specific heat capacity of water, as given in the problem?

4.2 Jg-1°C-1

336 Jg-1

2.1 kg

50 °C

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the change in temperature (ΔT) of the water as it cools down?

75 °C

25 °C

50 °C

100 °C

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much heat is lost by 2.1 kg of water when it cools from 75°C to 25°C?

4.2 x 105 J

4.41 x 105 J

105 J

157.5 J

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for calculating the heat (Q) required to melt a substance of mass 'm'?

Q = mcΔT

Q = mL

Q = CΔT

Q = L/m

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does 'L' represent in the formula Q = mL?

Specific heat capacity

Specific latent heat

Heat capacity

Thermal conductivity

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