A girl runs and cover a distance of 200m in 20 secends. The speed of the girl is m/s. ​

Asher cycles 12 miles in 16 hours. what is his speed?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

What component of earth’s atmosphere exists entirely as a result of photosynthesis?