a car was rolled up an inclined plane. it required a force of 20 kilograms to pull the car up the 50 meter length ramp to a final height of 10 meters. the car weighs 100 kilograms. what was the work accomplished using the ramp?

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above