True
The sample of the experiment is randomized in randomization.
Answer:
That is, mechanical waves cannot travel through a vacuum. This feature of mechanical waves is often demonstrated in a Physics class. A ringing bell is placed in a jar and air inside the jar is evacuated. Once air is removed from the jar, the sound of the ringing bell can no longer be heard.
Answer:
Hold active layer of soil in place; act as producers in ecosystem
... the density of the liquid
... the volume of the submerged object
