Work SI unit = joule = N*m= [kg]*[m/s^2] *[m] = kg * m^2/s^2
Work cgs unit = erg = [g][cm/s^2][cm] = g*cm^2 / s^2
Then 1 kg * m^2 / s^2 * [1000 g/kg] * [100cm/m]^2 = 10,000,000 g*cm^2/s^2
The relation is 1 joule = 10,000,000 erg or 1 erg = 10^-7 joule
It would be six because in every one molecule, there are three atoms of hydrogen, so just double that and you have six.
I can see three different transitions here:
3 --> 1
3 --> 2
followed by
2 --> 1 .
So we should expect to see three different 'colors'
being emitted from this excited mob.
20 cm = bright
40 cm = dim
The longer the wire the bigger the resistance
Ep = F * d
F = 20 N
d = 5 m
Ep = 20 N * 5 m
Ep = 100 J
So pick B. A Newton Meter is a joule.
