Question

ation?
123
lowing two is moving faster?
ver a distance of 400 km
motion of a boy on a path. Observe the graph
ang answer the following questions:
ng a distance of 500 km in
350 - -
300
um, first a cotton string
c string is used. What
me period?
ce between uniform and
Distance
(m)
---
-
--
-
-
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-
-
-
-
--
-
-rs used for?
-
-
mericals:
tes to cover a
Calculate its speed in
e to a playground,
0 minutes. I ran
minutes. What
1 2 3 4 5 6 7 8 9 10
Time
(min)
(i) What kind of motion is shown by the graph?
(ii) Which parts show maximum and minimum
speeds?
(ii) What is the average speed of the boy?
(iv) What does the part DE represent?
(V) What is the speed during part CD? Convert
it into m/s.
(vi) Is motion from 0 to B uniform? Calculate
the speed.
the working of
oh shows the​

Answer 1

Answer:

distance is equal to speed upon time

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Answer 2

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(i) The horizontal portion AB represents the change of state from solid to liquid at constant temperature. This gives the latent heat of fusion. Similarly, CD represents the change of state from liquid to vapour state at constant temperature. This gives the latent heat of vapourisation.

(ii) When CD = 2AB, the latent heat of vapourisation is twice the latent heat of fusion of that substance.