elements and
principles of art
Answers
Answer:
elements of art are color, form, line, shape, space, and texture. The principles of art are scale, proportion, unity, variety, rhythm, mass, shape, space, balance, volume, perspective, and depth.
Explanation:
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Answer:
Blood present in our bodies balances the atmospheric pressure acting on us.
Blood exert pressure, which is known as blood pressure.
The blood pressure balances the atmospheric pressure acting on us.
Explanation:
Atmospheric pressure is the air pressure which is exerted by the weight of air present in the atmosphere.
Atmospheric pressure is due to the weight of air present in the atmosphere above us. Atmospheric pressure also acts in all directions. On the surface of earth, the atmospheric pressure is maximum at the sea level. This is because the column of air above us is tallest at the sea level .The atmospheric pressure on the surface of earth is 101.3 kilo Pascal.
As we go up in the atmosphere from the surface of earth, the atmospheric pressure goes on decreasing. This is because as we go up in the atmosphere, the weight air above us goes on decreasing. So the atmospheric pressure on the top of a hill mountain will be much less than at its base.
The common unit for expressing and measuring atmospheric pressure is millimetres of mercury .The atmospheric pressure on the surface of earth is 760 mm of mercury.
Activity : The existence of atmospheric pressure
Atmospheric pressure
A glass tumbler is filled to the brim with water and covered with a piece of thick and smooth card. We press the card hard so that there is no air in the glass tumbler. Keeping the card in position with one hand we invert the glass tumbler full of water. The hand supporting the card is then withdrawn slowly. We will see that the piece of card does not fall through the tumbler is full of water and exerts pressure on the card in the downward direction. The cards does not fall because the atmospheric pressure acts on the card in the upward direction and holds the card in place. The upward atmospheric pressure acting on the card is greater than the downward pressure of water on the card.
Our body has a liquid called blood which flows through the blood vessel into each and every cell of our body. Our blood itself exerts a pressure called blood pressure which is slightly greater than the atmospheric pressure. Since the atmospheric pressure acting on our body is balanced by the blood pressure acting from inside, we do not get crushed.
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