Ananometer (nm) is 1/billion of a meter (1×10^-9 m). write this number:

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

The bohr model of the atom explained why emission spectra are discrete. it could also be used to explain the photoelectric effect. which is a correct explanation of the photoelectric effect according to the model?

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?