A sample contains 16 g of a radioactive isotope. How much radioactive isotope remains in the sample after 1 half-life?

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z