How did Thomson's discovery contradict Dalton's theory? a) (A) It showed that atoms were not indivisible.
b) (B) It showed that atoms have charge.
c) (C) It showed that atoms combine to make molecules.
d) (D) It showed that atoms have nuclei.

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

What are similarities and differences of reflection, refraction, diffraction and absorption?

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?