The great mathematician and inventor Archimedes of Syracuse lived in the third century BC and is often credited with using the concept of density to determine if a golden crown made for Emperor Hieron II was made of pure gold or a mixture of gold and silver. Research the formula used to calculate density, and explain how it would be possible to use density to determine if a crown was made of pure gold or not.

For Physical Science B

answer; i believe that the correct answer is (b) melosis; plz check first.good luck

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.