Advertisements
Advertisements
Question
The fig. shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.
Advertisements
Solution
When we bring two objects of different temperature together, energy will always be transferred from hotter to the cooler object.
Here, also heat will flow from hot milk tumbler to tub of cold water.
APPEARS IN
RELATED QUESTIONS
Write true or false for a given statement.
All solids expand by the same amount when heated to the same rise in temperature.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Fill in the blank
Black and dull surfaces are ______ of heat.
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.
What are the good and bad conductors of heat ? Give two examples of each.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
What are the effects of heat?
When heat energy is added to a substance, the kinetic energy of its particles ______ and so the particles move at a higher speed.
Explain the following effects of heat.
Expansion
