Acannon is mounted on a truck that moves forward at a speed of 5 m/s. the operator wants to launch a ball from a cannon so the ball goes as far as possible before hitting the level surface. the muzzle velocity of the cannon is 50 m/s. at what angle from the horizontal should the operator point the cannon?

How to calculate voltage drop in a series circuit

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

Humid air is a better electrical conductor than dry air. explain why you are most likely to receive a shock after walking across a carpet when the air is dry than when the air is humid.