About one in ten galaxies in the local group are not dwarf galaxies. Estimate the number of galaxies in the universe that are not dwarfs.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes