Answer:
D
Explanation:
light moves in a straight line (sorry if I'm wrong)
Atoms are a single entity (one type of element) whereas a molecule is a group of 2 or more atoms chemically bonded. Don't be confused that atoms are a single particle because they can be split into protons, neutrons and electrons.
Answer:
speed and velocity, c would be my guess
Answer:
The sphere's volume charge density is 2.58 μC/m³.
Explanation:
Given that,
Radius of sphere R= 8.40 cm
Electric field 
Distance r= 16.8 cm
We need to calculate the sphere's volume charge density
Using Gauss's law



Put the value into the formula



Hence, The sphere's volume charge density is 2.58 μC/m³.