Wmany atoms of nitrogen are in the chemical formula ni(no3)2

What is the frequency of a light wave with a wavelength of 620nm

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?