Acircle has an initial radius of 50ft when the radius begins decreasing at a rate of 2ft/s. what is the rate of change of the area at the instant the radius is 10ft?

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

For which pair of objects would adding the same a

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.