Which atoms above have an atomic mass that are twice their atomic mass that are twice their atomic number?

a) hydrogen, carbon, nitrogen

b)oxygen, fluorine, sodium

c)aluminum, sulfur, chlorine

d)helium, nitrogen, sodium

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

The metric unit of electrical power is the watt volt ampere ohm

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =