How is the gravitational potential energy stored in an object converted into kinetic energy a by throwing to object upward b by putting the object on the ground c by moving the object to one side or d by letting the object fall

The consumption of fossil fuels could be

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?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k