☰
Matter In Our Surroundings
A body thrown in the vertically upward direction rises upto a height h and comes back to the position of start.
Calculate:
(i) the total distance travelled by the body; and
(ii) the displacement of the body.
Given, a body thrown vertically upward comes back to it's position of start. The body rise upto a height 'h' when thrown vertically up.
(i) The total distance travelled = h + h = 2h.
(ii) The displacement is zero, because the initial and final positions coincide.
Sponsor Area
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.
Why is ice at 273K more effective in cooling than water at the same temperature ?
What produces more severe burns, boiling water or steam ?
8. Name A, B, C, D, E and F in the following diagram showing state change :
Sponsor Area
Sponsor Area