A boy, standing at point O, is whirling a ball on a string over his head at a constant speed. Even though the speed is constant, the ball is undergoing

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.