Advertisements
Advertisements
Question
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
Advertisements
Solution
Priyanshi is wearing cotton clothes which are more comfortable in summers because cotton absorbs the sweat which causes cooling on evaporation. Ali is wearing nylon clothes that do not absorb sweat. Hence, Ali will be uncomfortable.
APPEARS IN
RELATED QUESTIONS
Differentiate between melting point ,giving atleast one example of each.
Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.
Some ice is taken in a beaker and its temperature is recorded after each one minute. The observations are listed below
| Time (in minute) | Temperature (in °C) |
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 3.8 |
| 7 | 7.6 |
| 8 | 11.4 |
From the above observations, what conclusion do you draw about the melting point of ice?
State the melting point of ice.
The fixed temperature at which matter changes state from solid to liquid is called ______.
What are the changes of state in water? Explain.
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.
Sweating causes cooling because water has a ______.
A change of state is a change of a substance from ______.
Define latent heat of fusion?
