Applications of insulation - class-IX
Description: applications of insulation | |
Number of Questions: 16 | |
Created by: Akash Patel | |
Tags: temperature and heat heat clothes - our necessity transfer of heat physics heat transfer properties of bulk matter thermal properties of matter |
If we keep pop corn in a pressure cooker on a flame, heat is transferred from flame to corn by :
The molecules of medium vibrate about their mean positions during heat transfer in the process of
Air is a bad conductor of heat because:
.................. surface absorbs more heat than any other surface under identical conditions.
The heat transfer in air is poor because
Seema is planning a trip to Kashmir this summer. Which of the following clothes should she definitely pack?
Which of the following is not a valid reason for using cotton clothes in Summer ?
Why do we wear cotton clothes in Summer ?
Which of the following is a wrong pair of clothes worn during a particular season ?
Wool is used in making garments used in winter because
Which of the following fabrics is preferred for winter garments ?
Which of the following is not a reason for using woolen clothes in Winter ?
How does air trapped by the woolen fabric help ?
When a metal conductor connected to left gap of a meter bridge is heated, the balancing point.
Which of the following circular rods (given radius r and length l), each made of the same material and whose ends are maintained at the same temperature will conduct most heat?
A shining metallic ball with a small black spot on its surface is heated to very high temperature and then quickly taken to a dark room. Then.