Right I've got an exam at half past 4, tomorrow on a Saturday! I've spent the past few days doing past exam questions and a lot of them I'm able to do or at least work out for myself after a bit of time. Here's a couple I'm really stuck on so some help would be really really appreciated...
I have two questions that are very very similar to the one above but I'm pretty sure I have no value for the constant.
Question 1, parts a & b
A binary star has a total apparent magnitude of 15.00. One component star is twice as bright as the other.
(a) Show that the apparent magnitude...
Homework Statement
If atmosphere can be treated as an isothermal ideal gas of constant mean molecular mass m, show that density drops exponentially with height - ρ= [ρ0]e^-z/h - where h is a constant
Homework Equations
ρ= [ρ0]exp^-z/h (derivation of ...)
ρ=density
ρ0=initial density at...
I've read my lecture notes about 100x but can't even begin to see where this derivation can come from. A previous derivation was the equation
dP/dz = -gρ
(P = pressure, z = distance, g= acc due to grav, ρ = density)
If atmosphere can be treated as an isothermal ideal gas of constant mean...