What is destructive interference in magnetic waves

d) the number of neutrons plus the number of protons

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

connect the batteries in series and hope

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.