Which of the following do all of the small objects in the four categories (dwarf planets, asteroids, comets, and meteoroids) have in common? a) they all orbit the sun, b) they all have icy compositions, c) they are all less than a kilometer in diameter, d) they are all located in the asteroid belt

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.