fluids Flashcards
(8 cards)
Buoyancy - definition, examples,
definition: the upwards force a fluid exerts on an object. if this force is strong enough it can oppose gravity. That happens when the density of the object is lesser than the fluid
Archimedes’ Principle: the buoyant force is equal to the weight of the water which is displaced. if the object has a low density then it will float
example: a hot air balloon, a boat on water, an ice berg
dancing craisins experiment
- the carbonation changes the OAD when the bubbles form on the bottom of the craisons as they sit at the bottom of the glass
- when the OAD is low enough for them to float, they rise, then turn upside down, popping the bubbles and causing them to sink
- then the OAD is higher so they sink and the process repeats
viscosity - definition and examples
definition: the messure of a fluids resin stance to flow
ex. of high viscosity: honey, maple syrup, molasses
ex. of low viscosity: water, milk, juice
viscosity controlled variable
type of fluid
viscosity independent variable
temperature of fluid, distance to flow
independent variable def: the factor being manipulated or changed to see how it affects the viscosity of a fluid
Particle Theory (KMT)
- all matter is made up of tiny particles
- particles are in constant motion
- particles are attracted to each other
- they have empty space between them
- particles in solids have little space between them and are tightly packed
- particles in liquids are close but can move around
- particles in gasses move rapidly and are far apart
- tempature affects the movements of particles
- changes in state (S,L,G) are because of changes in the movements and arrangement of particles
Explain the boat and anchor problem
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Fluid pressure - definition, examples, and formula
definition: the force exerted by a fluid per unit area on a closed container of the given fluid
examples: blood pressure
formula: p= f/a
