Atomic Mass Unit

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

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.

And each proton has an atomic mass of one, in atomic mass units, and each neutron has an atomic mass of one atomic mass unit.

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

That is, on average, stellar populations are less efficient in producing light per unit mass, and the reason for that, is that there is a lot of mass in very low mass stars which are not very good light producers.

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

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.

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

Now, these measurements do include a little bit of dark matter, but it's not really important at the level we're talking about, because the more massive stars are far more luminous per unit of mass and because they live shorter, the age of stellar population plays an important role, and those that are dominated by younger stars will be more luminous per unit mass.

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

Mass communication and mass transit.

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

Mass

mass

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?

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

less mass than all mass in stars.

Impossible unit conversion based on unit types

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