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forces in fluids
| Question | Answer |
|---|---|
| snowshoes enable a person to walk on deep snow because the snowshoes | have larger surface area |
| pressure is measured in | pascals |
| a substance whose shape can easily change is a | fluid |
| fluid pressure is the total force exerted by the fluid divided by | area |
| what is the equation for fluid pressure | p= F a |
| air pressure exerted equally on an object from all different directions is | balanced forces |
| given the air pressure outside your body is so great, why aren't you crushed? | pressure inside us = pressure outside |
| Air pressure decreases as | elevation increases |
| air pressure increases as | water depth increases |
| what type of substance does pascal's principle deal with? | fluids |
| A hydraulic device consists of a U-shaped tube with two pistons. A force of 50N is exerted on the small piston, which has an area of 1cm squared. What is the total force on the other piston if it has an area of 20cm? | 20x50=1,000 |
| what scientific rule explains hydraulic systems? | pascal |
| what multiplies a force by transmitting it to a large surface area? | hydraulic systems |
| what does a hyrdaulic system do? | multiplies force |
| Which of the following is true of the buoyant force? | a force acting upward |
| what scientific rule states that the buoyant force of an object is equal to the weight of the fluid displaced by the object | Archimedes Principle |
| A ship stays afloat as long as the buoyant forces | equal or greater |
| The pressure exertedby a moving stream of fluid | less than surrounding fluid |
| smoke rises up a chimney partly because of | Bernoulli's |
| a _________________ is one newton per square meter (unit of pressure) | pascal |
| water pressure ___________________ with depth | increases |
| a mountain climber might carry oxygen because the air pressure at the top of the mountain is __________________ than the air pressure at the bottom | less air pressure |
| a block of wood is placed in a jar of water, according to Archimedes' principle the ________________ on the block is equally to the weight of the displaced fluid. | buoyant force |
| chocolate syrup sinks in milk because the chocolate syrup is more ___________ than milk | dense |
| An eagle can glide though the air on a windy day thanks in part to______________ Principle. | Bernoulli's |
| HOw can a woman wearing spiked high heels exert a greater pressure on the floor than another woman of equally mass wearing work boots? | Spiked heels have less surface areas than work boots. The pressure is focused on the heel of the high heeled shoe and spread out over the work boot. |
| In the "egg in a bottle" demonstration, explain how the egg got into the bottle | The pressure decreased in the bottle and caused the egg to fall in. |
| In the class demonstration, crushing can, I heated the liquid in the can until it produced water vapor. Why did the can implode when it was placed in the cold water? | because of the treated liquid if was turned into a gas causing it to implode. |
Created by:
mcburkey