Hi all,
I have some difficulties understanding a formula for calculating the incidence angle for incoming solar radiation on a sloping surface. I found that:
angle of incidence calculated as cos(j) = sin((pi/2)-surface slope)*sin(altitude angle) + cos((pi/2)-surface slope)*cos(altitude...
Hi,
I need to convert a value of 12*10-16 m7 N-3 y-1 to the units of kPa-3 m2 s-1. Can anyone help me?
where: m = meters, N = Newton, y = year, s = seconds.
Thanks!
Hi all,
I'm trying to calculate the daily solar insolation (integrated solar irradiances from sunrise to sunset) for a given location and day of the year. For latitude 43.2° and April 15th, I get:
H0 = (solar constant * scale factor for intra annual variation of sun-earth distance * 86400...
Hi all,
According to the sunrise equation, the hour angle of the sun at sunset is:
cos H = -tan(a)tan(d)
where H = the hour angle, a = latitude and d = solar declination angle.
This equation says that H at sunset = -H at sunrise. Now, I have a few questions concerning that:
1) I was...
Hi all,
I don't know if I'm on the right forum to ask this, but maybe somebody knows anything about brightness temperatures measured by remote sensing devices.
In a paper that I read "Atmospheric corrections for retrieving ground brightness temperature at commonly-used passive microwave...
Oh I get it,
it's just that the temperature change is Eulerian (a local change at a fixed position) whereas the energy flux density is Lagrangian (it crosses the air on its path while having a negative or positive value).
Hi,
From the first law of thermodynamics it follows:
Cp * (δT/δt) = (δQ/δt)
where Cp = specific heat capacity, T = temperature, Q = heat, t = time
From this formula, you would derive that temperature keeps on increasing as long as dQ/dt > 0. But if you, for example, look at the idealized...
Hi,
I tried to solve this problem myself and I'd like someone to check it :) Thanks already!
A ball is rolling towards a block, which is connected to a spring. Assume no friction occurs. The initial velocity of the ball is 10 m/s. The spring constant is k = 5 N/m. Mass of the ball = 5 kg and...
Homework Statement
An object is placed at 25 cm to the left of a diverging lens. A converging lens with a focal length of 12 cm is located 30 cm to the right of the diverging lens. The two-lenses-system forms a real inverted image 17 cm to the right of the converging lens (see attachment)...