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Matter In Our Surroundings
Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground.
(The value of g = 9.8 ms-2).
Given,
Mass of the object, m = 10 kg
Height of the object, h = 6 m
Acceleration due to gravity, g = 9.8 ms-2
Potential energy of the object, Ep = mgh
= 10 x 9.8 x 6 J
= 588 J.
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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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