Answer:
Osteoblast, osteocytes and osteoclasts  are responsible for breaking down bone during remodeling.
Explanation:
The process which is responsible during bone formation in equally in initial and later stages of remodelling, they are the bigger cells which are responsible for the synthesis and mineralisation  of bone. Osteocytes are the rich in cells in the bone tissue, which is helpful in detection of the mechanical loading, also manages the in bone formation and bone resorption. Osteoclast are cells that disintegrate the bone to start normal bone remodelling and also contemplate bone loss in pathologic condition by growing its resorptive capacity.
 
        
             
        
        
        
It tells the audience if the results support or contradict the hypothesis
Explanation:
When a scientist describes the materials that she used and how she performed her experiments, it tells the audience if the results supports or contradicts the hypothesis. 
- A hypothesis formulation helps to test a scientific claims. 
- Experiments are usually hinged on well designed hypothesis. 
- From the hypothesis, one can be sure the experiment is tuned and designed within the scope of the observation desired to be tested. 
- This is why the materials used and procedures followed in an experiment can tell if the results supports or contradicts the hypothesis. 
Learn more; 
Experiment brainly.com/question/5096428
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Answer:
Ion- an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
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The work done is 137 joules.
Lifting opposes the acceleration of gravity, which is 9.8 m/sec/sec.
20 x 0.7 x 9.8 = 137 J (kg-m2/sec2)