6. The drawing shows a boy with a bow and arrow. He is holding the arrow and
pulling it back.
string
bow
arrow
(a) Two horizontal forces act on the arrow. These are the force exerted by the
boy's hand and the force exerted by the string. The arrow is not moving.
The boy pulls the arrow with a force of 150 N. What is the size of the force
exerted by the string on the arrow?
N​

so easy. just google the electromagnetic waves and it’ll pop up.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.