Pressure if fluids

What is a fluid

Gas or liquid

How to calculate pressure of fluid

Pressure(Pa) = Force normal to surface(N)/area of surface(m²)

What does pressure in fluids cause

A force normal to any surface in contact with fluid

What is the atmosphere

A thin layer of air around the earth and is most dense at surface of the Earth

What happens as we increased in altitude(move away from the surface of the Earth)

The atmosphere gets less dense/atmosphere pressure gets less dense

How is atmospheric pressure created and why does it decrease as height increases

On a surface by air molecules colliding with the surface.

-As height increases atompshere gets less dense so there are fewer air molecules able to collide with surface

Why do mountain climbers take oxygen tanks

As air pressure on mountain may be toooe to supply all the oxygen they need m

Why does water from bottom hole squirt out much further than water from the top hole

As water at the bottom of container is at a higher pressure than water at the top

How to calculate pressure of a column of liquid

Pressure(Pa) = height of column(m) X density of liquid(kg/m3) X GFS(N/Kg)

Why does pressure increase with depth

As depth increases there is a greater weight of liquid acting downwards

What is upthrust

When a forced exerted on the bottom of the object is larger than the force acting on top of the object causing a resultant force upwards know as upthrust

How can a object float

When the upthrust is equal to the objects weight

How does a object sink

When the upthrust is less than the objects weight

The size of upthrust acting on object is the same as….

The weight of water displaced by the object

What happens if an object less dense than a fluid is placed in it

The object has to displace a small volume of water before the weight of water displaced equals the weight of the object so now upthrust equals the weight of the object causing it to float m

What happens if an object that has the same density of water is placed in water

-Object had to displace its own volume of water in order for the weight of water displaced is equal of the weight object. Once again the upthrust will equal the weight of the object and it will float. But surface of the object is at the surface of the water

What happens if an object is more dense than water and is placed in the water

The object a displace a volume of water equal to its weight so the weight of object is greater than upthrust so it sinks.