solids, liquids and gases

Question 1

relationship between density, mass and volume

Answer 1

density = mass/ volume - p=m/v

Question 2

relationship between pressure, force and area

Answer 2

p = F/A

Question 3

density

Answer 3

mass per unit of volume

Question 4

kg/m^3 = ?g/ cm^3

Answer 4

1000g/ 10^6 cm^3

Question 5

density of irregular object

Answer 5

volume of irregular object = volume of water displaced

Question 6

pressure

Answer 6

scalar quantity

Question 7

1Pa = ?

Answer 7

N/m^3

Question 8

weight = ?

Answer 8

mass x g.f.s

Question 9

N/m^2 = ? N/cm^2

Answer 9

N/10^4 cm^2

Question 10

smaller area?

Answer 10

more pressure, faster speed, cuts better

Question 11

bigger area?

Answer 11

less pressure, easier to walk on snow, less sinking

Question 12

why are liquids incompressible?

Answer 12

tightly packed with no gaps

Question 13

pressure in a liquid

Answer 13

the same all around, acts equally in all directions, increases with depth

Question 14

hydrostatic pressure

Answer 14

refers to a liquid in equilibrium, caused by weight of liquid in a container - weight exerts force on bottom of container equal to liquids weight

Question 15

what does amount of pressure due to a liquid depend on

Answer 15

amount of pressure due to a liquid depends on the weight of the liquid above that point

Question 16

relationship between pressure, density of fluid, acceleration due to gravity amd height of fluid column

Answer 16

P (N/m^2)= ρ(kg/m^3) x g(N/kg) x h (m)

Question 17

atmospheric pressure

Answer 17

refers to a gas in balance - caused by weight of gas exerting force on surface

Question 18

when gas pressure is bigger than patm

Answer 18

Pgas = ρgh

Question 19

when Pgas is less than Patm

Answer 19

Pgas = Patm - ρgh

Question 20

pressure of gases

Answer 20

gas molecules collide with surface - exerting pressure

Question 21

size of gas pressure

Answer 21

density of molecules (how many there are), speed of molecules

Question 22

movement gases

Answer 22

randomly, high speeds, collide with surfaces exerting pressure

Question 23

boyles law

Answer 23

P1 x V1 = P2 x V2, P and V - inversely proportional, temp is constant

Question 24

absolute zero

Answer 24

-273 degrees celsius = 0K

Question 25

temperature

Answer 25

physical quantity describing degree of heat present in a substance

Question 26

Relationship between kinetic energy and T(K)

Answer 26

KE is directly proportional to T (K)

Question 27

gay lussac's law

Answer 27

volume is constant, pressure is proportional to temperature in kelvins

Question 28

why does pressure increase inside container

Answer 28

temp increases - kinetic energy increases - speed of particles increases - more frequent collisions - particles exert higher forces to walls during collisions

Question 29

why is water ejected by higher force in bigger depth

Answer 29

mass of water above increases -weight increases - water is ejected by higher force in bigger depth