Those are lines of equal power consumption per unit area, which I measure in watts per square meter.

So, for example, the middle line there, 0.1 watts per square meter, is the energy consumption per unit area of Saudi Arabia,

They all have a small power per unit area, and we have to live with that fact.

But in practice what we do a differential counts, how many per unit flux or other per unit magnitude.

Concentrating solar power in deserts delivers larger powers per unit area, because you don't have the problem of clouds.

Well, what's the area of this unit circle?

So, spectral energy distribution which is the shape describes the spectrum of an object is defined to be energy per unit time per unit second per unit for frequency or wavelength and we never observe that, that's a differential unit.

So the surface brightness, which is light per unit area in the sky or solid angle I should say, remains constant.

So here, you have a lot of those particles per unit space and here you have very few of those particles per unit space.

And 55 is a lot. On a per area basis,

They deliver about 5 watts per square meter of land area.

One unit that is often used is jansky which was introduced by radio astronomers and it's 10 ( 23) ergs per second per centimeter square per hertz.

The quantitative analysis, or galaxy clustering, started in 1950s by Shane and Wirtanen astronomers who counted galaxies per unit area on photographic sky place taken at Lick Observatory.

lensed per unit time is giving you effectively an optical depth due to gravitational microlensing.

When we say rate, we mean the amount of energy transferred per unit of time.

Just to be clear, sometimes angular velocity is actually measured in revolutions per second but the SI unit is in radians per second

That is if we can measure the total luminosity, but, we usually measure specific flux, which is power per unit wavelength or unit frequency.

Now, I am going to try to measure that same area in a different unit.

Fossil fuel usage is down 60 percent per unit of production, due to efficiencies in renewables.

Unit

Unit

Unit

Per second per megaparsec.

But the very simple idea is, how much of that particle do you have per unit space?

Impossible unit conversion based on unit types

Time Unit

No unit

Unit Conversion

Choose Unit

New Unit

SI Unit

Organizational Unit

Organizational unit

Organizational unit

Unit Converter

Unit Converter

From unit

To unit

Organizational Unit

Duplex Unit

Astronomical Unit...

Unit one.

Unit 4.

A unit.

But the area of the square is just one unit, and so the infinite sum must equal one.