Pressure is defined as .....................over a given area.
Force
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15
Does water pressure increase or decrease the deeper you go?
Increase
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15
why does a sharp knife cut more easily than a blunt knife?
it has a smaller area of contact when it is used rather than a blunt knife so the pressure of the knife is much greater than the pressure of the blunt knife of
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15
If you try to push a pin with pointed end,it will pierce through easily.Why?
smaller the area ,higher the pressure
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15
what do vehicle brakes use?
Pressure
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25
Why do scuba tanks have high air pressure?
So people can breathe for longer under water.
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15
Will air pressure be high on top of the mountain or on the beach?
Beach
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15
How can pressure be reduced?
By increasing the surface area
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15
why should food never be heated in a sealed can?
pressure of gas is increased as the gas molecules move about quickly in different directions -the heat gives the molecules more kinetic energy -there are more
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15
Do liquids and gases also exert pressure?
Yes
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15
what does pressure in a liquid increase with?
depth and density
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15
Friction always acts in the _______ direction to that in which the object is moving.