Isotope Y has a half life of 88 minutes. How long will it take to end up with 3.125% of a sample being radioactive?

What substance has a mass of 9.5g and volume of 2.1cm^3

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!

37.0 °c = °f (human body normal temperature)