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Matter In Our Surroundings
A particle moves from a point P directly towards another point Q which is at a distance of 10 cm from P. It then comes back to P directly. Calculate:
(i) the total distance travelled; and
(ii) the displacement of the particle.
Given,
Distance between points P and Q = 10 cm
(i) Total distance travelled = PQ + QP
= (10 + 10) cm
= 20 cm.
(ii) Displacement of the particle will be zero, because the particle comes back to the initial position. That is, the initial and final position is same.
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Convert the following temperatures to Kelvin scale.
35°C
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Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
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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
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Water at room temperature is a liquid.
Give two reasons to justify
An iron almirah is a solid at room temperature.
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