Density of a material is the same, no matter the or the of the material

The answer is mass and volume.

Explanation:

Yes, you use mass and volume to find density, but they don't affect the density in any way. Do they change the density? Do they create more or less of the density? No.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

b.a device that inputs heat into a cool object