The half life of uranium-235 is 4.5 billion years. If 0.5 half-lives have elapsed, how many years have gone by? a.9 billion
b.2.25 billion
c.4.50 billion
d.4.0 billion

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?