random Qs Flashcards
how does the size of the nucleus affect the rate of fusion events
A larger nucleus means the charge will be greater, which means the force needed to bring the nuclei together is increased. So a larger nucleus requires a greater Ke for fusion therefore it decreases the rate of fusion
A larger nucleus also means a larger radius. So it requires a smaller Ke so the rate of fusion increases
what does 1 electron volt mean
work done on an electron in accelerating it through a potential difference of one volt
what is dielectric constant and an equation for it
the same as the relative permittivity
relative permittivity = charge stored with dielectric present/charge stored without dielectric
explain how polar molecules in a dielectric cause a change in capacitance
electric fields exist between plates
polar molecules align with their positive side facing the negative plate
producing a counter electric field and therefore reduces the field between the plates
pd is reduced between the plates but the charge stays the same so the capacitance increase as C = Q/V
what benefit does launching a satellite from the equator of Earth have compared to the North Pole, and why
less fuel is required to send into orbit as the initial speed is greatest due to the Earth’s rotation
how is velocity incorporated into faradays law
F = N Δɸ/Δt = BLv
1 weber is = 1 volt second; because the unit of flux change per second (weber per second) is the same as the volt
the area swept out by the rod = Lv so the flux swept out per second is BLv
what is molar mass equal to
the mass of substance / number of moles
