<span> Radio waves, microwaves, infra red, visible light, ultra violet, x-rays, gamma rays. </span>
<span />
Answer:
1800J
Explanation:
Given parameters:
Weight of the book = 20N
Total distance covered = 45m + 15m + 30m = 90m
Unknown:
Total work performed on the books = ?
Solution:
To solve this problem we must understand that work done is the force applied to move a body through a certain distance.
So;
Work done = Force x distance
Work done = 20 x 90 = 1800J
I can't particularly place what Icelandic contributed.
But every other culture contributed majorly.
So I would go for option b.
1-D Eustress is a positive response
2-B resistance
3-A Imagine you are doing your gymnastics
Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules. That's it.
