The mass of the products of a chemical reaction the mass of the reactants.
O a. is less than
Oc. may be more or less than
Ob. is the same as
Od. is greater than

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.