A frequency of one hundred ________ means the wave is vibrating ...

[faduma]

A frequency of one hundred ________ means the wave is vibrating one hundred million times per second; this is a typical carrier frequency for FM (frequency modulation) radio.
 
  A) gigahertz B) millihertz C) megahertz D) hertz E) kilohertz

Question 2

In essence, the nebular theory holds that ________.
 
  A) the planets each formed from the collapse of its own separate nebula
  B) our solar system formed from the collapse of an interstellar cloud of gas and dust
  C) nebulae are clouds of gas and dust in space
  D) The nebular theory is a discarded idea that imagined planets forming as a result of a near-collision between our Sun and another star.

[Tabitha_2016]

Answer to Question 1

C

Answer to Question 2

B

[faduma]

Thanks for the timely response, appreciate it

[fatboyy09]

Gracias!