What piece of equipment would a hospital most likely have as back up in case of a power failure?
a. electric motor
b. generator
c. alternator
d. electromagnet

the answer to your question here is B a generator

v=ir = 3x15 =45 v

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.