temperature

Question 1

what is temperature

Answer 1

temperature is a measure of degree of hotness or coldness of an object

Question 2

what is temperature microscopically

Answer 2

temperature is a quantity which measures the average kinetic energy due to the random motion of molecules in the system

Question 3

mercury and alcohol-in-glass thermometer

Answer 3

alcohol-in-glass thermometer can measure low temperatures, but the working range is narrower (-39 to 357)

mercury-in-glass thermometer can measure high temperatures and have a wider working range (-115 to 78)

Question 4

thermometric property of a rotary thermometer

Answer 4

the change in curvature of the bimetallic strip, the coiled bimetallic strip bends more. It is used in ovens and large freezers and can be used at home for measuring room temperature

Question 5

infra-red thermometer

Answer 5

amount of infra-red received by the sensor

Question 6

aquarium thermometer (liquid crystal)

Answer 6

colour change of the liquid

Question 7

resistance thermometer

Answer 7

increase in resistance of metal coil

Question 8

thermistor thermometer

Answer 8

decrease in resistance of thermistor

Question 9

what is the lower fixed point on the celsius scale

Answer 9

it is the temperature of pure melting ice at normal atmospheric pressure

Question 10

what is the upper fixed point on the celsius scale

Answer 10

it is the temperature of the steam over pure boiling water at normal atmospheric pressure

Question 11

what is the physical meaning of the slope of the graph

Answer 11

the slope represents the change in length of the liquid column when there is a unit rise in temperature

Question 12

how to calculate slop of graph

Answer 12

length over change of temperature

L2 minus L1) over (T2 minus T1