An incident ray comes in parallel to the principle axis of a concave mirror. Is it reflected:
w) back along the incident ray
x) at 30 degrees to incident ray
y) through the focal point
z) through the center of curvature

The diagram shows a person using a piece of gym equipment to lift weight which best describe the body in terms of simple machine

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that