Assuming nothing else blocks their view, approximately how far can two people stand from each other in clear atmosphere until they can not longer see each other due to the curvature of the earth ? [take : radius of earth = 6400 km] (assume height of each people is 2m) (1) 10 m (3) 1 km (2) 100 m (4) 10 km

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?

How is the acceleration of an object in uniform circular motion constant? a - in magnitude only b - in direction only c - in both magnitude and direction d - in magnitude, direction & orientation