A small sphere of mass m is connected to the end of a cord of length r and rotates in a vertical circle about a fixed point O. The tension force exerted by the cord on the sphere is denoted by T. r O θ What is the correct equation for the forces in the radial direction when the cord makes an angle θ with the vertical?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.