Density + Pressure

Question 1

density equation

Answer 1

density = mass/volume

special p = m/V

Question 2

units of density

Answer 2

g/cm(cb) or kg/m(cb)

Question 3

density of an object depends on what

Answer 3

its made of, not size or shape

Question 4

a solid object will … on a fluid if it has a lower density than the fluid

Answer 4

lower

Question 5

how to work out the volume of an object that is denser than water but is oddly shaped

Answer 5

put it in a beaker of water and see how much the water level rises on the side measurements, work out the difference and that is the volume of the object

Question 6

pressure is a measure of what

Answer 6

the force being applied to the surface of something

Question 7

what is pressure measured in

Answer 7

Pascals (Pa)

1 Pascal = 1 N/m(sq)

Question 8

pressure equation

Answer 8

pressure = force/area 
p = F/A

Question 9

the same force applied over a larger area creates a …

Answer 9

lower pressure

Question 10

in gases and liquids at rest, the pressure at any point acts …

Answer 10

equally in all directions

Question 11

in gases and liquids, pressure increases with …

Answer 11

depth

Question 12

pressure difference equation

Answer 12

pressure difference = height x density x gravity

p = h x special p x g

Question 13

the pressure of a gas is explained by what

Answer 13

the movement of its particles

Question 14

what is particle theory

Answer 14

says that colliding gas particles create pressure

Question 15

when a gas particle collides with something what does it do

Answer 15

exerts force and changes direction (sealed container this creates an outward pressure)

Question 16

the outward pressure a gas has in a sealed container depends on what

Answer 16

how fast the particles are going and how often they hit the walls

Question 17

how to create more pressure in a sealed container

Answer 17

heat it up –> more kinetic energy of the particles –> particles hit container walls hard –> more pressure created
(double temp = double pressure = proportional)

Question 18

when volume reduces of the gas in a sealed container what happens to the pressure

Answer 18

it increases

Question 19

when the gas is put in a big sealed container what happens to pressure

Answer 19

pressure decreases

Question 20

boyles law

Answer 20

p (proportional sign) 1/v

Question 21

pv = constant temp

Answer 21

p1 V1 = p2 V2

Question 22

p/Temp (in K) = contant volume

Answer 22

p1/T1 = p2/T2