Apendulum consists of a 7-kg uniform slender rod and a 12-kg sphere. the pendulum is subjected to a torque of m = 50 n-m, and it has an angular velocity of 2 rad/sec when θ = 30°. determine the magnitude of the reactive force that pin o exerts on the pendulum at this instant.

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions