Ablock of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. it has a mass of 213 g. what is its density? a. 638 g/cm3 b. 6240 g/cm3 c. 0.0773 g/cm3 d. 7.89 g/cm3

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.