What Is Pressure? Flashcards
What is the SI Unit for pressure?
Newton per square meter (N m-2) (N/m2) also called Pascals (Pa)
What is pressure in a liquid?
Height x Density x Gravitational Field Strength
The pressure at one depth in a liquid acts ______ in all _____.
Equally
Directions
Which types of submarines are used to work at greater depths?
Small Submarines
What is atmosphere?
The atmosphere is the layer of air enveloping the earth. It extends up to 1000 km above the earth’s surface.
What is atmospheric pressure?
When the weight of air exerts a pressure on the surface of Earth.
Do our bodies feel the high pressure at sea level?
No as it balances it.
Why do humans suffer at high altitudes?
The atmospheric pressure is lower.
Why do nosebleeds occur at high altitudes?
Pressure difference between the body and the external pressure.
True or false
Modern aircrafts have pressurized to ensure the safety of their passengers from the low pressure at the high altitudes
True
