A volcano ejects a glowing chunk of lava straight up.
It travels 6.0 seconds before it stops and begins to fall back to earth.
Calculate the speed the lava had leaving the volcano.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Will give ! what are the advantages and disadvantages of nuclear power? check all that apply. one advantage of nuclear energy is that it does not produce carbon dioxide emissions. storage of nuclear waste is a short-term problem associated with nuclear energy. the problem with uranium mining is that a large quantity of uranium must be extracted to meet energy needs because the energy release from uranium fission is so low. safe operation of a nuclear power plant can be jeopardized by a human mistake.

Drug abuse will not lead to physical and psychological dependence. true or false ?