Question

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subject:- physics
chapter name:- heat
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Answer 1

(A) Fill in the blank spaces by choosing the correct words from the list given below.

List: thermometric, Kelvin, expand, 32° F, lower.

1. Lower standard point on Fahrenheit scale is lower.

2. Mercury is commonly used as thermometric liquid as it stays a liquid over a wide range in temperature.

3. Alcohol expands more than mercury.

4. The temperature of pure melting ice is taken as the 32° F standard point.

5. The SI scale of temperature is called Kelvin scale.

__________________________

(B) Statements given below are incorrect. Write the correct statement:

1. 0° C is equal to zero Kelvin.

Answer → 0° C is equal to 273.15 Kelvin.

2. A good thermometric liquid should absorb large amount of heat energy from the body whose temperature is recorded.

Answer → A good thermometric liquid should have a low heat capacity so it can obtain the temperature of a material easily.

3. Upper fixed point on Fahrenheit thermometer is 100° F.

Answer → Upper fixed point on Fahrenheit thermometer is 212° F.

4. The temperature at which the mercury freezes is -93° C.

Answer → The temperature at which the mercury freezes is -38.83° C.

5. 1° C increase in temperature is equal to 274 K rise in temperature.

Answer → 1° C increase in temperature is equal to 274.15 K rise in temperature.

__________________________

(C) Write True or False for the following statements.

1. 0 K is equal to -273° C

Answer → True

2. A thermometric liquid should have uniform rate of expansion.

Answer → True

3. 284 K is equal to 11° C.

Answer → True

4. Celsius scale is the SI unit for measuring the temperature.

Answer → False

5. Lower standard point on Fahrenheit scale is 0° F.

Answer → False

__________________________

(D) Tick the most appropriate answer.

1. Zero Kelvin is equal to :

Answer → -273° C

2. SI scale of temperature is :

Answer → Kelvin Scale

__________________________

Answer 2

$\huge{\boxed{\rm{Questions}}}$

${\bigstar}\large{\boxed{\sf{\pink{Question \: 1}}}}$

$\large\purple{\texttt{Helping box is given below}}$

$\large\red{\texttt{thermometric}}$

$\large\red{\texttt{Kelvin}}$

$\large\red{\texttt{Expand}}$

$\large\red{\texttt{32°F}}$

$\large\red{\texttt{Lower}}$

Question 1. Lower standard point on fahrenheit scale is ___.

Question 2. Mercury is commonly used as ___ liquid as it stay a liquid over a wide range in temperature.

Question 3. Alcohol ___ more than mercury.

Question 4. The temperature of pure melting ice is taken as the ___ standard point.

Question 5. The S.i unit of temperature is called ___ scale.

${\bigstar}\large{\boxed{\sf{\pink{Question \: 2}}}}$

Question 1. 0°C is equal to zero Kelvin.

Question 2. A good thermometric liquid should absorb large amount of heat energy from the body.

Question 3. Upper fixed point on fahrenheit thermometer is 100°F

Question 4. The temperature at which mercury freezes -93°C

Question 5. 1°C rises in temperature is equal to 274 K rises in temperature.

${\bigstar}\large{\boxed{\sf{\pink{Question \: 3}}}}$

Question 1. 0° K is = -273°C

Question 2. A thermometric liquids should have uniform rate of expansion.

Question 3. 284 K = 11°C

Question 4. Celsius scale is the scale for measuring temperature.

Question 5. Lower standard point of fahrenheit scale is 0°F

${\bigstar}\large{\boxed{\sf{\pink{Question \: 4}}}}$

Question 1. Zero Kelvin = ___.

Question 2. SI scale of temperature is ___.

$\huge{\boxed{\rm{Answers}}}$

${\bigstar}\large{\boxed{\sf{\pink{Answer \: 1}}}}$

Answer 1. Lower

Answer 2. Thermometric

Answer 3. Expands

Answer 4. 32°F

Answer 5. Kelvin

${\bigstar}\large{\boxed{\sf{\pink{Answer \: 2}}}}$

Answer 1. 0° K is = 273.15 K

Answer 2. A good thermometric liquid should absorb low amount of heat energy from the body.

amount of heat energy from the body.Question 3. Upper fixed point on fahrenheit thermometer is 212°F

°FQuestion 4. The temperature at which mercury freezes -38.83°C

Question 5. 1°C rises in temperature is equal to 274.15 K rises in temperature.

${\bigstar}\large{\boxed{\sf{\pink{Answer\: 4}}}}$

Answer 1. True

Answer 2. True

Answer 3. True

Answer 4. False

Answer 5. False

${\bigstar}\large{\boxed{\sf{\pink{Answer \: 5}}}}$

Answer 1. -273°C

Answer 2. Kelvin scale

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