Determine which types of waves would be able to pass through the various solid and liquid layers of earth. label each path with either p, s, or p and s (if either type of wave is possible) to indicate which type(s) of body waves could be represented by that path.
because they are too small to get shocked
a.radioactive isotopes are used to detect medical problems.
c.radioactive isotopes are used to treat some diseases.
d.radiation is used to kill cancer cells.
albert einstein published the theory of special relativity in 1905, and general relativity in 1916.