The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its pressure. This can be easily understood by visualising the particles of gas in the container moving with a greater energy when the temperature is increased.
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The temperature an volume of liquids and gases are dependent upon the pressure of the substance. When liquid and gas particles are placed in a high pressure container then they change their medium from liquid to solid and from gas to liquid.
What is the effect of pressure on gas and liquids?
The pressure law states that for a given constant volume of gas in a sealed container the temperature of the gas in the container is directly proportional to the pressure of the gas. This can be easily understood through visualizing the particles of a gas in the container which is moving with a greater energy when the temperature is increased in the container.
Thus, when the pressure is applied on gas particles, it compresses to liquid and when the pressure is increased on liquid material, it becomes solid. The effect of pressure on solid is negligible as it does not change anything in solid. Thus, if the pressure is applied to a substance its state changes from Gas → Liquid → Solid.
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Answer:
1. They are all used to grab objects.
2. The human doesn't use them to move, the dog uses them to dig, the chicken uses them to scratch, and the crocodile uses them to swim.
3. Humans use them to hold tools and the other three use them to move.