Who desobed atoms as small spheres that could not be divided into anything smaller?
a. bohr
b. dalton
c. rutherford
d. thomson

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

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

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?