The chemical formula for water, H2O, means that each water molecule contains
a) two hydrogen atoms and zero oxygen atoms.
b) two hydrogen atoms and two oxygen atoms.
c) two hydrogen atoms and one oxygen atom.
d) one hydrogen atom and two oxygen atoms.

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.