Question
The work done on a body of mass 10 kg to lift it through a certain height is 490 J. Calculate the height through which the body is lifted. Take g = 9.8 m/s2.
Solution
The work done on a body of mass 10 kg to lift it through a certain height is 490 J. Calculate the height through which the body is lifted. Take g = 9.8 m/s2.
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
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
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