After 34.8 min a 43.5g sample of Fr-215 has decayed down to 10.0g what is its half life

Which statement best explains the relationship between an area is geography and the temperature of its surface water

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.

Chemical engineering who specializes in negotiating for large purchases and instructing customers in use of the products are