Please help…SpecificHeatProblems

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Which of the following statements is true about planck’s law

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.