John is running the 1600-meter race at his school's track meet. He runs the full 1600 meters in 6.5 minutes. What is John's average speed in meters/second rounded to
the nearest tenth?

4.1m/s

Explanation:

6.5min=6×60+30=390s

v=1600÷390=4.1m/s

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons