Other Stuff

Question 1

what is temperature

Answer 1

average kinetic energy of particles in a substance. measured in celcius, fahrenheit and kelvin

Question 2

what is heat

Answer 2

sum of the kinetic energy of particles in a substance. measured in J

Question 3

how is evaporation different to boiling

Answer 3

condensation = average article has enough energy to evaporate
boiling = every particle has enough energy to evaporate

Question 4

why do matte surfaces absorb heat more quickly?

Answer 4

heat is IR radiation, and matte surfaces absorb light energy more than shiny ones.

Question 5

which seismic waves are longitudinal and which are transverse

Answer 5

P waves = longitudinal

S waves = transverse

Question 6

how does speed, frequency and wavelength change during refraction?

Answer 6

speed changes but frequency stays the same, so wavelength also changes

Question 7

range of frequencies that can be heard by the human ear

Answer 7

20 - 20,000 Hz

Question 8

range of wavelengths of EM waves

Answer 8

10^-15 –> 10^4

Question 9

EM spectrum from low frequency to high frequency

Answer 9

radio
microwaves
infrared
visible light
ultraviolet
X Ray
gamma

Question 10

speed of light

Answer 10

3 x 10^8

Question 11

wavelength of visible light

Answer 11

300 - 700 nm

Question 12

does a voltmeter go in series or parallel?

Answer 12

parallel

Question 13

does an ammeter go in series or parallel?

Answer 13

in series

Question 14

how does current change in a series circuit?

Answer 14

current is the same everywhere

Question 15

how does voltage change in a series circuit?

Answer 15

total voltage = voltage 1 + voltage 2

Question 16

how does resistance change in a series circuit?

Answer 16

total resistance = resistance 1 + resistance 2

Question 17

how does current change in branches of a parallel circuit?

Answer 17

total current = current 1 + current 2

Question 18

how does voltage change in branches of a parallel circuit?

Answer 18

voltage is same everywhere

Question 19

how does resistance change in branches of a parallel circuit?

Answer 19

resistance is less than in series circuits, as electrons have different pathways to go around the resistor.

Question 20

alpha particle

Answer 20

helium nucleus of mass number 4 and atomic number 2

Question 21

beta particle

Answer 21

electron with mass number 0 and atomic number -1

Question 22

charge of alpha particle

Answer 22

+2

Question 23

charge of beta particle

Answer 23

-1

Question 24

effect of alpha particle on atom

Answer 24

decreases mass number by 2 and atomic number by 2

Question 25

effect of beta particle on an atom

Answer 25

increases atomic number by 1, as a neutron is turned into a proton