Answer:
The answer is C (Higher energy levels)
Explanation:
Because it's C
Density=mass/volume
to find the density
mass=42kg
volume=22m3
so density=42/22
density=1.9Kgm3
On Earth, none of the atmosphere is.
Answer:
Light and sound waves are different in the sense that:
Light can travel without a medium, and is a physical particle
Sound is a vibration in a medium
Light can be altered by a different medium
Same with sound
Explanation:
There's no answer list, but here are some answers.
