Other Stuff Flashcards
what is temperature
average kinetic energy of particles in a substance. measured in celcius, fahrenheit and kelvin
what is heat
sum of the kinetic energy of particles in a substance. measured in J
how is evaporation different to boiling
condensation = average article has enough energy to evaporate boiling = every particle has enough energy to evaporate
why do matte surfaces absorb heat more quickly?
heat is IR radiation, and matte surfaces absorb light energy more than shiny ones.
which seismic waves are longitudinal and which are transverse
P waves = longitudinal
S waves = transverse
how does speed, frequency and wavelength change during refraction?
speed changes but frequency stays the same, so wavelength also changes
range of frequencies that can be heard by the human ear
20 - 20,000 Hz
range of wavelengths of EM waves
10^-15 –> 10^4
EM spectrum from low frequency to high frequency
radio microwaves infrared visible light ultraviolet X Ray gamma
speed of light
3 x 10^8
wavelength of visible light
300 - 700 nm
does a voltmeter go in series or parallel?
parallel
does an ammeter go in series or parallel?
in series
how does current change in a series circuit?
current is the same everywhere
how does voltage change in a series circuit?
total voltage = voltage 1 + voltage 2
how does resistance change in a series circuit?
total resistance = resistance 1 + resistance 2
how does current change in branches of a parallel circuit?
total current = current 1 + current 2
how does voltage change in branches of a parallel circuit?
voltage is same everywhere
how does resistance change in branches of a parallel circuit?
resistance is less than in series circuits, as electrons have different pathways to go around the resistor.
alpha particle
helium nucleus of mass number 4 and atomic number 2
beta particle
electron with mass number 0 and atomic number -1
charge of alpha particle
+2
charge of beta particle
-1
effect of alpha particle on atom
decreases mass number by 2 and atomic number by 2
