Aflat circular plate of copper has a radius of 0.262 m and a mass of 61.5 kg.
what is the thickness of the plate?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.