Sources of background radiation include a cosmic rays from space.
b atomic bomb testing.
c nuclear power plants.
d all of the above.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Word equation for k(s) +h2o(l) yield koh (aq) + h2

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number