If you know the answer just answer it please :) Which is an example of gravitational potential energy only.

Question 2 options:

a puppy walking around under a tree

a rolling skateboard going down a hill

an apple resting on the teacher’s desk

an elevator moving up to the 3rd floor

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?

The sum of the oxidation numbers in a neutral compound is always