In the US Alternating Current is used. It has a frequency of 60 Hz. If you are looking at the waveform for AC how many wavelengths pass in 2 seconds? A.24
B.240
C.60
D.120

the increase of protons   hope this

the correct answer is:

a. formation of precipitation

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter