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Matter In Our Surroundings
A few speed-time graphs for non-uniform motion of objects moving along a straight line are shown in Figs. 8.48(a), (b), (c) and (d).
Tell how the speed is changing with time in each of these graphs?
(a) Speed is increasing with time.
(b) Speed is decreasing with time.
(c) Speed is uniform.
(d) Speed is oscillating. That is, it alternately increases and decreases with the passage of time.
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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 :
Both boiling and evaporation convert a liquid into vapour. What is the difference between the two process
Define Evaporation
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