I have a question entirely unrelated to Latin/Greek. I'm regularly reading about astronomy, and every time I encounter certain numbers, I am wondering how to properly express them in English. Can anyone help me and spell them out for me? It's been bothering me for ages not knowing how to pronounce such numbers.

Examples for numbers (scientific notation):

- 1.5 x 10^-2 W/kg
- 2 x 10^3 W/kg
- 4 x 10^26 W
- 2 x 10^-12 kg/m³

Examples for equations:

- F = (G * m1 * m2) / r²
- a = v²/r
- v = sqrt((G * M) / r)
- M = (r * v²) / G

Carolus Raeticus

PS: I've just (the day before yesterday) received my copy of the 4th edition-"Oxford Classical Dictionary". It looks great (and due to its bulk serves as a great weapon against potential burglars).