Arock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range r. in terms of the original range rmax, what is the range rmax the rock can attain if it is launched at the same speed but at the optimal angle for maximum range?

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?