A physics major is cooking breakfast when he notices that the frictional force between his steel spatula and his Teflon frying pan is only 0.330 N. Knowing the coefficient of kinetic friction between the two materials is 0.0410, he quickly calculates the normal force. What is it

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