Answer:
A scientific hypothesis
Explanation:
A scientific hypothesis is an idea or explanation for a fairly narrow set of phenomena that you then test through research, experimentation, experience, scientific background knowledge, preliminary observations, and logic. They are the initial building block in the scientific method and they are also beyond a wild guess but less than a well-established theory.
It gets heavier and heavier
Answer:
true
Explanation:
newton's third law of motion states that if body A exerts a force on the body B, then body B will exert an equal and opposite force on body A,
this is called action reaction pair
hope this helps
Answer;
-A vent stack
Explanation;
-A vent stack is best described by, the vertical, upper portion above the top-most fixture through which gases and odors escape the sanitary drainage system, carrying no liquids or solids.
-The vent stack usually runs parallel with the soil/waste stack and may either extend up through the roof or connect to a stack vent. While a stack vent is the uppermost portion of a soil/waste stack that continues the pipe from above the highest connected fixture out the roof.
I to have no clue as well