Mechanical digestion is chewing, and chemical digestion is the saliva in your mouth breaking down food.
The potentially harmful effects of mining can be reduced by A. Flushing mines with water.
Answer:
The density of gold is of 18 grams per cm3.
Explanation:
The mass density of a homogeneous material expresses how much mass of that material is present in a given volume. Since the density of an object is obtained by dividing its mass by its volume, to obtain the density of gold, its 90 grams of mass must be divided by its 5 cm3 volume, performing the following calculation:
90/5 = X
18 = X
Thus, the density of gold is 18 grams per cm3.
Mercury has a high boiling point of 357 degrees C.
Mercury has a freezing point of −39 degrees C.
When there was know life on the earth
