What change should be affected in the velocity of a body to maintain the same kinetic energy if its mass is increased four times?
Kinetic energy of a body is given by,
K.E. = mv2. ... (1)
From equation (1) we can say that if mass is increased four times, the velocity must be reduced to half to maintain the same kinetic energy.
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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