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Matter In Our Surroundings
State which of the following situations are possible and give an example of each of these:
(a) a body moving with constant acceleration but with zero velocity.
(b) a body moving in a certain direction with an acceleration in the perpendicular direction.
(a) Even when a body's velocity is zero a body can have acceleration.
For example, when a body is thrown up, at it's highest point veocity is zero. But, the acceleration of the body is equal to acceleration due to gravity.
(b) It is possible to have acceleration in the perpendicular direction for a body moving in a certain direction.
For example, an aeroplane moving horizontally is acted upon by acceleration due to gravity that acts vertically downwards.
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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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