☰
Matter In Our Surroundings
What can you conclude from the following graphs about the state of motion of an object?
(i) Displacement-time graph is parallel to the time-axis
(ii) Velocity-time graph is a straight line making an angle with the time-axis.
The conclusions are:
(i) The body is at rest when the displacement-time graph is parallel to the time axis.
(ii) The body has uniform acceleration when the velocity-time gaph is slightly inclined with the time axis.
Sponsor Area
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.
Give two reasons to justify
An iron almirah is a solid at room temperature.
Sponsor Area
Sponsor Area