Answer:
A. 216.36 
B. 96.56
Explanation:
Let 
be the distance in first part.
= velocity × time
= 85 × 
= 49.58 km
Let 
be the distance in first part.
= 130 km
Average velocity = 
When second leg of the trip is
A. Toward north
Average velocity = ![\frac{[tex] s_{1} + s_{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Btex%5D%20s_%7B1%7D%20%2B%20s_%7B2%7D%20%20%20)
}{Total time} [/tex]
Average velocity = 
Average velocity =216.36
B. Toward south
Average velocity = ![\frac{[tex] s_{1} - s_{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Btex%5D%20s_%7B1%7D%20-%20s_%7B2%7D%20%20%20)
}{Total time} [/tex]
Average velocity = 
Average velocity =96.56
Things that stretch or compress store elastic potential energy
I might be incorrect but I’m pretty confident that all of it is right. I think you’re good.
Short Answer: YES
Long answer:
Density is generally regardless of how big or small a substance is and is neither dependant on its shape. A statue made of gold and a brick made of gold might have different masses and volume but they have same density.
By universal definition, density of a substance is the mass per unit volume.
D = Mass/Volume
