<span>2. Light energy does not require a medium through which to travel.
Hope this helps!</span>
Answer:
The answer is
<h2>2.7 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
mass of aluminum = 40.5 g
volume = 15 mL
Substitute the values into the above formula and solve for the density
We have

We have the final answer as
<h3>2.7 g/mL</h3>
Hope this helps you
Answer:
In both nuclear and chemical reactions, two physical quantities are seen to be conserved and unchanging: the number of particles and the total charge. A constant number of particles in nuclear reactions does not imply that mass is conserved.
Explanation:
Answer:
It is the most recent idea of the atom and it is proved to be true
Explanation:
This is called a life span.