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MCAT > Fluids Physics > Flashcards

Fluids Physics Flashcards

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MCAT flashcards
1
Q

What does specific gravity tell us?

A

How dense something is when compared to water

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2
Q

What is pressure?

A

Force divided by area

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3
Q

What is hydrostatic gauge pressure?

A

Pressure due to water in tank

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4
Q

What is hydrostatic gauge pressure proportional to?

A

Depth and density

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5
Q

Under what circumstances is total pressure not proportional to depth and density of the liquid?

A

When pressure on the surface does not equal zero

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6
Q

If the density of a liquid is constant it is said to be

A

Incompressible

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7
Q

What is buoyant force equal to?

A

Weight of the fluid displaced by the object

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8
Q

Archimedes principle

A

Buoyant force = weight of fluid displaced by the object

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9
Q

If density of object is less than density of fluid

A

Object will float

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10
Q

If object density greater than fluid density

A

Object will sink

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11
Q

When does static equilibrium result?

A

When object has same density as fluid

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12
Q

Pascals law

A

Confined fluid will transmit an externally applied pressure change to all parts of the fluid and container without a loss of magnitude

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13
Q

What is flow rate?

A

Volume of fluid that passes a particular point per unit time

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14
Q

What is flow speed?

A

How fast the fluid moves

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15
Q

When does flow speed increase?

A

When tubes narrow

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16
Q

When does flow speed decrease?

A

When tube widens

17
Q

What is the relationship between flow speed and cross sectional area?

A

Inversely proportional

18
Q

What are requirements for ideal fluid flow?

A

Fluid is incompressible, viscosity is negligible, streamlines are visible, flow rate is steady

19
Q

What condition of flow does bernoullis equation apply to?

A

Ideal fluid flow

20
Q

What is efflux speed?

A

How fast fluid will flow out

21
Q

What is torcellis result?

A

Shows the efflux

22
Q

When flow speed is greater, what is pressure?

A

Pressure is lower

23
Q

What is stress?

A

Force divided by area

24
Q

Why doesn’t stress equal pressure?

A

It does not have to be perpendicular to the area that it acts on

25
Q

What is strain?

A

Ratio of appropriate change in length to objects original length

26
Q

What is Hookes law?

A

Stress is proportional to strain

27
Q

What is Young’s modulus?

A

Constant of proportionality for tensile or compressive stress

28
Q

What is shear modulus?

A

Constant of proportionality for shear stress

29
Q

For tensile tensile or compressive stress what is strain equal to?

A

Change in length over original length

30
Q

For shear strain what is strain equal to?

A

Distance of shear over original length

MCAT (46 decks)

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