5. If the power of a lens- 2 D, what is its focal length?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.