Heat

Q:  Define thermometry?
Ans:  The art of measuring temperature is known as thermometry.


Q:  Define Temperature?
Ans:  Temperature is the measure of hotness and coldness of a body.


Q:  Write the formula for conversion of Celsius to Fahrenheit scale?
Ans: 

TF = (9/5) TC + 32

Q:  Write the formula for conversion of  Fahrenheit scale to Celsius?
Ans: 

TF = (5/9) (TF - 32)

 Q:  What is the relation between Kelvin and Celsius scales?
Ans: 

TK = TC + 273

 Q:  Define thermometer?
Ans:  The instrument which is used to measure temperature is called thermometer.


Q:   Why desert nights are colder whereas days are very hot ?
Ans: Desert nights are colder whereas days are very hot because specific heat of sand is very low. It gets hot and cold fast. 


Q:   Convert 30^oC into Fahrenheit.
Ans:   T_F =(9/5) x TC + 32^o

            =(9/5) x 30 + 32

            =54 + 32 = 86^oF

Q:     What is the latent heat of fusion of ice?
Ans:   The latent heat of fusion of ice is 336,000 joules per kilogram.

Posted in: 9th Grade, Heat, Physics