A book is sitting on a desk. It has a mass of 40.0g and a dimension of 22cm by 25cm. What is the pressure applied?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

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