Answer: 5
Explanation: you divide the distance by the time and get the speed.
Answer:
Isotopes
Explanation:
Isotopes are atoms of the same element that contain an identical number of protons, but a different number of neutrons. Despite having different numbers of neutrons, isotopes of the same element have very similar physical properties.
Answer: Potassium perchlorate
Explanation:
Answer:
Water
Explanation:
Because water is very important
