Alightbulb has a power of 100 w. and is used for 4 hours. a microwave has a power of 1200 w and is used for 5 minutes.

a. how much energy is used by the lightbulb?

b. how much energy is used by the microwave?

c. the lightbulb has an efficiency of 1.8%. how much heat energy does the lightbulb produce in 4 hours?

a) E=Nt=100*(4*3600)=1440000 J

b) E=1200*(5*60)=360000 J

c) Q=E*(100-1.8)/100=1414080 J

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

no simpler subs form complex ones. synthesise = make