Answer:

Explanation:
The energy density of electromagnetic waves can be computed as

The power is the energy per unit of time. Hence we can take uE and Ub as 15.29J
By taking apart E and B we have

hope this helps!!
Answer:
work accomplished = 300*30
= 9,000 J
applied work = 9,000 + 2,000 = 11,000 Joules
efficiency = 100 * work accomplished/work applied
= (9/11)100 = 81.8 %
force applied = (300/6)/.818
= 61.1 N
assuming that the 6 in your question refers to mechanical advantage
The answer is true. fluorescence demonstrates a sparkly like light beam and also can bounce off of other beams
The answer to this is B, C, and D. hope this helped
Explanation:
100 CM = 1 m
45 CM = 45 / 100 = 0.45 m
hope it helps:)