Answer:
I gonna give you the number so but you need to round 6.19047619048
Explanation:
- This is a speed formula so you would use the formula speed=distance/time
- You need to rearrange it to time=distance/speed
- So you need to divide 13m by 2.1 m/s
The atomic mass of sodium (Na) is 22.98977
I think it is B. Mechanical waves carry energy through a medium.