Jim is holding a rock motionless above a well when he lets the rock go. he hears a splash 1.8 s later. what is the velocity of the rock just as it hits the water?

The flowers in a flower arrangement are actually alive

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom