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evaporation:

occurs at the surface of a liquid when it gets enough energy and becomes a gas. rate depends o f the temp. atmospheric pressure, and surface area of a liquid. while evaporating, molecules cool: hot molecules with high energy leave

1

heat:

transfer of energy(Joules)

2

ideal gasses:

all collisions are perfectly elastic
no intermolecular forces
all molecules are identical
all molecules are spherical
volume of molecules are very small compaed to container

3

newtons law of cooling:

the rate of heat transferred depends on the difference in temp between two bodies

4

fluorescence

electrons are excited to high energy level and omit light as they relax

5

frequency

the number of cylces per time *Period is inversly proportional to frequency

6

angular frequency:

w= 2PIEF or W= 2 pie/ T (Period)

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resonance:

increase in amplitude due to input of energy at the frequency of oscillation or integer multiple

8

refraction:

bending of a wave when changing medium

9

critical angle:

Øc= sin^-1 (n2/n1)

10

standing waves:

two waves of equal frequency traveling in opposite directions in phase
(standing waves do not transfer energy)

11

rayleigh criterion

Ø= wavelength/ slit width

12

polarization:

a wave where the disturbances in the medium occurs in one plane

13

brewters angle

angle of incoming light where max polarization occurs

n = tanø

14

blackbody radiation

EM radiation due to accelerating charges

15

inverse square law

F

16

Change in temp is inversely proportional to....

Mass

17

momentum:

mass times velocity (Vector)

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force

rate of change of momentum

19

impulse

change in momentum

20

units of work

joules

21

pressure

force per area

22

unit of power

watt

23

q= mc

J Kg-1 K-1

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kelvin

273 + celcius

25

water freezes

0 degrees celcius

26

water boils

100 degrees celcius