How much force do you feel when you are riding in a rollercoaster vs. when two football players crash together at
full speed?

tube or goog with be a great resource to with that question

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

1 a

2 b

3 b

4 d

5 d

6 d

explanation: