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3.1 Pressure

AB
What is the area of a rectangle that is 4cm x 8cm?32 sq. cm
Why do people wear big snowshoes when walking on snow?To spread weight over larger area to reduce pressure
Why do elephants have big feet?To spread weight over large area to reduce pressure
What causes people to have weight?Gravity
Why does it hurt worse to get hit with the point of a nail than the head?The point has less area which causes more pressure
Why does a balloon break when you hit it with the point of a thumbtack and not the head?The point causes more pressure
How much pressure does a 100g block cause on a 20sq cm base?5g/sq cm (100g divided by 20sq cm)
What units did we use for pressure?g/sq cm
Why do women cause more damage in high heels?High heels have less area which cause more pressure
If you put 400g on a 2cm x 4cm base, what is the pressure?50g/sq cm (400g/8sq cm)
Does a person weigh more in skates than tennis shoes?No, weight is constant
What would happen if you removed your space helmet in outer space?You would blow up as all your body fluids would boil out
Is air pressure greater at the top or bottom of Mt. Everest?The air pressure is greater at the bottom of Everest
Is water pressure greater at the top or bottom of the ocean?At the bottom of the ocean
Which hole in our milk jug squirted out the farthest?The bottom hole (most pressure)
How much pressure is caused by a 200g plate sitting on 5 sq cm?40g/sq cm
Under what ocean do we all live?An ocean of air
Why was it so hard to separate the two suction cups when we pushed them together?The air inside was pushed out and outside air pressure holds them together
Why doesn't the ocean of air we live under crush us?There is an equal amount of pressure inside us pushing back?
Why do our ears "pop" when we drive in the mountains?Pressure inside our ears rush out to equal lower pressure outside
Do fluids move from High to Low pressure or Low to High pressure?High to Low (think of air coming out of a balloon)

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