Answer:
A 0.4 g/cm³
Explanation:
The density of a substance, which is a cube in this case, can be calculated by using the formula:
Density = mass/volume
Where;
Density = g/cm³
Mass = grams
Volume = cm³
In this question, each side of the cube measures 3 cm. This means that the volume of the cube can be got by multiplying 3 × 3 × 3 = 27cm³. Hence, volume of the cube = 27cm³.
Mass of the cube = 12g
Density = 12/27
Density = 0.4444
Approximately, density = 0.4 g/cm³
.movement in a gas or liquid in which the warmer parts move up and the cooler parts move down convection currents.
Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid.
C. Upward; downward. As the hot rock rises, cooler rock flows downward to take its place next to the core, where it is heated and becomes buoyant enough to rise again later
Answer:
At least three principle methods of desalination exist: thermal, electrical, and pressure. The oldest method, thermal distillation, has been around for thousands of years. In thermal distillation, the water is boiled and then the steam is collected, leaving the salt behind.
Explanation:
Hope this helped