A rock is thrown upward from level ground in such a way that the maximum height of its flight is equal to its horizontal range R
. (a) At what angle theta is the rock thrown?
(b) In terms of its original range R, what is the range R_max the rock can attain if it is launched at the same speed but at the optimal angle for maximum range?
Copernicus discoveres thr heliocentric theory. It was previously believed that everything orbited the Earth, geocentric theory. Copernicus said he believed the Earth and everything else orbited around the Sun.
Bias-based bullying among youth increases when controversial voter referendums (e.g., marriage equality) arouse divisive political discourse and receive