Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.
Answer:
electromagnetic waves
Explanation:
"wave" is a common term for a number different ways in which energy is transferred
A. 60 miles
B. 5 hours
Unless you are looking for slope, in which case the answer is different
Answer:
13.1
Explanation:
that's what I'm gonna go with, but u can research more
The answer to that would be that
they require so its mandatory for mechanical waves to travel through a medium
