Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
Molecules of a substance are always in a state of............ and so they possess .............
Differentiate between melting point ,giving atleast one example of each.
Explain the term Melting.
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?
What are the changes of state in water? Explain.
A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.
Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?
In an endothermic process, the speed of the molecules is ______ hence they move faster.
A puddle of water gets pooled around the glass of ice cream or a glass of ice cubes. When it is kept at room temperature. Give reason.
A change of state is a change of a substance from ______.
