Wire 1 has a resistance r1. wire 2 is made of the same material, with length 1/2 as long and diameter 1/4. what is the resistance ratio r2/r1?

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material