PHYSICS Flashcards
what does this mean: element undergoes B decay a nuclear neutron is converted to nuclear proton as the nucleus EMITS AN E
emitting an electron - -1e
N/m2 is equal to
kg/m x s2
where does sound travel most rapidly
greatest is solid bc of strong bonds and close proximity - then water then gas
a nearsighted person can only focus on ____ and far ones are
nearby obj, far ones are blurry
with myopia is the focal length shorter or not than it should be
yes, shorter, so rays from distant obj form a sharp img IN FRONT OF RETINA
____occurs when your eyeball is shorter than normal or your cornea is curved too little.
Farsightedness - the focal length is longer than it should be, visual image being focused behind the retina rather than directly on it, could be bc eyeball is too small
the terminal voltage is the ____
is the voltage provided to the external components of the circuit - V= electromotive force minus ir (current times resistance)
when going from n=2, to n=3 what is req
energy is required and atoms GAINS ENERGY
when a light wave pass from air to glass, what changes in speeds
light slow down, and speed will speed up - light slows bc the index of refraction in the glass is greater than air,
light can be carried along a distance within a transparent material by means of total internal reflection because of
reflection - optical property
kinematic equation to find distance
vit + 1/2 a t2, = d + vt
formula for vf
vf2 = vi2 + 2ad & vi + at
when ask for ratio height of image to the height of the object is what
4/3 : 4 - 1/3
power is defined as the rate of doing
work/ t
a 15 ev photon collides with and ionizes a H atom, if atom was originally in the ground state (ionization potential = 13.6) what is KE of ejected electron
15 - 13.6 = 1.4
an obj with 15 g initally is immersed in benzene and suffers an loss of 5 g (placed in wate/fluid), what is specfic gravity of obj, if the specific gravity of benzene is 0/7
first buoyant force is equal to weight of fluid displaced by obj so it would be the 5 g that was diplaced - no ratio of obj mass to fluid mass is 15:5 = 3 now times this by specifc gravity of benzene which was 0/7 - 2.1
pipe open at both ends what would be formula for wavelength
2L - length
if pipe is closed then what is the formula for wavelength
4L
in series explain V, I, R
V is added up, I is same, R is added up
with parallel explain V,I,R
V is same, I is added, R is added inverse
when we neglect viscoity where will stream have the highest pressure
point of max diameter =
person is far sight and they clearly see no closer than 300 cm what does this mean
300 cm is the total from bw the obj and the image distances must be at least 300 cm so then the mirror must be half this distance which is 150 cm - plane mirror
sounds cannot propgrate throught this medium
vacuum
person standing comparing the arterial bp measured in arm compared to leg, the leg woule
be greater because the column of blood bw the arm and the leg has a hydrostatic pressure – independant of blood flow or viscosity
hydrostatic presure formula
rgh - r is desnity - pressure at bottom of tube
electric power for transmission over long distances is stepped up to a very high voltage in order to
cut down the heat loss in transmission wires
if it says adj length bw crest and trought that is only equal
to half wavelenth - have to times it by 2
formual for work with m and h
mgh
