5. How often waves repeat is called their 6. Draw a high frequency wave.
7. Draw a low frequency wave.
8. Energy travels in what direction?
9. Draw how the amplitude is measured.
10. All waves have a similar
11. What spectrum is made up of different waves?
12. What do radio waves bounce off of before returning to the
earth?
13. X-ray waves are
than light waves so they have longer wavelengths.
Ok

Ithink the answers is a i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

Independent variable is something that is changed in a experiment. 

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.

Answerthe valence of an element or radical is equal to the number of positive or negative charges on the ion.