Lexi is researching crime rates. she is trying to make a conclusion about whether the crime rate changes with the population in each county in her state. what is the dependent variable of her investigation?

The wilson chamber is used to study: direction, speed, and distance of radioactivity the intensity of radiation the appearance of individual atoms all of the above

The reaction q+r2=r2q is found to be first order in r2 and

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.