Units 19-23

Question 1

tidal force

Answer 1

forces of different strength pulling on opposite sides of a body producing a stretching effect

Question 2

tidal bulges

Answer 2

drawn towards the points facing and opposite the moon

Question 3

spring tides

Answer 3

unusually large tides that occur at new and full moons

-solar and lunar tidal forces working together

Question 4

tidal braking

Answer 4

effects of tides tend to slow down an object’s rotation

• moon is tidally braking the earth
• day lengthens each century

Question 5

Conservation laws

Answer 5

identify fundamental properties that do not change under almost any condition

Question 6

kinetic energy

Answer 6

energy of motion
measured in Joules
.5mv^2

Question 7

angular momentum

Answer 7

measure of the tendency of a spinning object to keep spinning with rotation axis pointing in the same direction
= mvr

Question 8

Light

Answer 8

energy that can travel through space without a medium

Question 9

electromagnetic wave

Answer 9

wave that when interacting with matter, interacts with e-s

Question 10

interference

Answer 10

sources of light can interfere with each other reinforcing or cancelling each other’s effects

Question 11

Brightness

Answer 11

amount of light received

Light(total)/4pi x d^2

Question 12

Rutherford model of atom

Answer 12

atom having a dense core (nucleus) around which electrons orbit

Question 13

absorption

Answer 13

light energy stored in an atom

Question 14

emission

Answer 14

when an e- drops from a higher energy level to a lower energy level

Question 15

electron transition

Answer 15

when an e- moves between orbitals

Question 16

wavelength

Answer 16

determine’s light’s color spacing between wave crests

Question 17

frequency

Answer 17

number of wave crests that pass a given point in one second

Question 18

Hertz

Answer 18

(1/s), Hz

Question 19

Energy

Answer 19

(hc)/lambda or hv

Question 20

white light

Answer 20

mixture of all colors of light

Question 21

blackbody

Answer 21

theoretical object that absorbs all radiation falling on it
black objects absorb all wavelengths
excellent absorbers and emitters

Question 22

Wien’s Law

Answer 22

the hotter the body the more strongly it will radiate at short wavelengths

Question 23

Wien’s Law equation

Answer 23

T=(2.9 x 10^6 k*nm)/(lambda max)