165 g. An electric current runs through the wire for a short time and its temperature rises from 21°C to 39°C. What minimum quantity of heat energy is converted by the electric current?

A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.

What is the coefficient of kinetic friction μk between the block and the tabletop?

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