A 1210 kg rollercoaster car is moving 7.33 m/s. As it
approaches the station, brakes
slow it down to 1.88 m/s over a
distance of 5.29 m. How much
work did the brakes do?

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine