Time period = time/no. of waves = 6/3 = 2s
C. The Independent variable
It is the variable that you manipulate, while dependent is the response.
I got this answer from the internet
Type of energy was used is kinetic energy.
Light travels<span> as a </span>wave<span>. But unlike sound </span>waves<span> or water </span>waves<span>, it does not need any matter or material to carry its energy along. This means that </span>light<span> can </span>travel<span> through a vacuum—a completely airless space.</span>
