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Matter In Our Surroundings
Distinguish between work, energy, and power. State the SI units for each of these quantities.
When a force acts on a body and the body moves in the direction of the force, work is done.
SI unit of work is joule.
The ability of a body to do work is known as energy.
SI unit of energy is Joule.
The rate of doing work is called power.
SI unit of power is watt.
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Convert the following temperature to Celsius scale.
573 K
Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
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