A toy car with a mass of 3.1 kg has 60 J of kinetic energy as it drives along the straight part of a racetrack. What is the velocity of the car?

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

You can decrease the resistance of a length of wire by

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2