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Physics. 2 > Density and Pressure > Flashcards

Density and Pressure Flashcards

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1
Q

What is the formula for density

A

DENSITY = MASS ÷ VOLUME

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2
Q

MASS = DENSITY ?

A

MASS = DENSITY × VOLUME

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3
Q

VOLUME = MASS ?

A

VOLUME = MASS ÷ DENSITY

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4
Q

What is the unit for density

A

g / cm3 or kg / m3

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5
Q

What is the unit for mass

A

g or kg

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6
Q

What is the unit for volume

A

cm3 or m3

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7
Q

How do you find out the volume of an irregular object

A

volume of irregular objects = volume of overall amount - previous volume (e.g. known volume, 50cm3)

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8
Q

How do you find the mass of a liquid

A

mass of liquid = mass of overall amount - mass of container

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9
Q

Why do objects float in terms of density

A

the objects density is less than the liquids density

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10
Q

High density materials are …

A

… heavy for its size

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11
Q

What do high density molecules and atoms have

A

a large mass and are tightly packed

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12
Q

What is the formula for pressure

A

PRESSURE = FORCE ÷ AREA

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13
Q

FORCE = PRESSURE ?

A

FORCE = PRESSURE × AREA

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14
Q

AREA = FORCE ?

A

AREA = FORCE ÷ PRESSURE

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15
Q

What is the unit for pressure

A

N / m2

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16
Q

What is the unit for force

A

newtons (N)

17
Q

What is the unit for area

A

m2

18
Q

N / m2

A

Pascals (Pa)

19
Q

What is ‘concentrating the load’

A

apply a force over a small area so the pressure becomes higher

20
Q

What is an example of ‘concentrating the load’

A

ice skate blades, knife

21
Q

What is ‘spreading the load’

A

apply a force over a large area so the pressure becomes smaller

22
Q

What is an example of ‘spreading the load’

A

flat shoes that do not leave scuff marks, surf boards

23
Q

What are fluids

A

liquids and gases (something that can float)

24
Q

What can pressure in a liquid do

A

acts in all directions and increases with depth

25
Q

When you go deeper in a fluid what happens

A

the pressure increases with depth

26
Q

Give examples on where pressure in fluids is seen / felt

A

swimming pool, aeroplane

27
Q

Can fluids exert pressure

A

yes

Physics. 2 (9 decks)

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