In a fuel cell there is direct conversion of mechanical energy into electricity.

a. a chemical reaction produces heat, which then produces electricity.
b. reduction takes place at the cathode.
c. there is oxidation, but no reduction.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth