fluid study Flashcards

1
Q

what is particle theory

A

all matter is made up of particles

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2
Q

do a positive scientific notation

A

did you actually

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3
Q

do a negative scientific notation

A

do it

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4
Q

how to calculate density

A

mass / volume = density

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5
Q

why isnt sand (eg) a fluid?

A

because it is made up of tiny solids that are small enough to fit into a container

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6
Q

whats aerodynamics?

A

the way objects move through air

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7
Q

why does a car with a spoiler have worse aerodynamics than without?

A

because the spoiler interrupts the movement of the circulating air

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8
Q

whats hydrodynamics?

A

how objects move through water

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9
Q

what’s scientific debit

A

the flow rate of a fluid

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10
Q

what’s viscosity

A

the way/ability of how a fluid flows

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11
Q

what’s large visco, give an example of a fluid

A

a fluid with a large force of particle attraction

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12
Q

what’s small visco, give an example of a fluid

A

a fluid with a small force of particle attraction

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13
Q

what’s a fluid

A

a form of matter that continuously flows under an applied shear stress, or external force.

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14
Q

what’s the Archimedes principal

A

when a weight is pushed through a fluid, and the weight pushed down is brought back up by the fluid.

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15
Q

what’s the weight pushed up called in the Archimedes principal

A

buoyant force

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16
Q

what’s positive floatation, eg

A

object that rests on the surface of a fluid. eg: leaf

17
Q

what’s neutral floatation, eg

A

object that rests in between surface and fluid. eg: boat

18
Q

what’s negative floatation, eg

A

object that moves straight through a fluid. eg: dumbell

19
Q

what happens when a fluid is under pressure

A

it becomes more compact and their volume decreases, as well as the particles collide and becomes more compact

20
Q

what matter is more compressible than others

21
Q

what if the temperature increases to a fluid

A

the particles become faster and more spaced out

22
Q

pressure formula

A

force / surface

23
Q

explain the type of force and surface in the pressure formula

A

the force is gravitational force by newton, and the surface is surface in m squared

24
Q

what are pascals

A

units of weight or pressure

25
what do 1000 pascals equal
1 kilo pascal
26
what's pascals law
if we increase the pressure of an enclosed fluid, the pressure is scattered all around the enclosement.
27
what is hydraulics, give an example
a machine operated by liquids, washing machine
28
what is pneumatic, give an example
a machine operated by air pressure, bike tire
29
how close are particles in liquids
they're neutral, and somewhat spacious. the force is not too strong
30
how close are particles in gas
they're very spaced out, and all over the place. there's barely a force of attarction
31
how close are particles in solids
they're very compact. the force of attraction is very strong.