A runner has a velocity of 11.1 m/s for 9 seconds until he finishes the race and comes to a stop.
What is his acceleration?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as