D. used by the entire scientific community
B. more accurate system of measurement
Answer:
1. a 
b 
c 
2. 
Explanation:
a). The work done by the tension is:




b). The work done potential of gravity




c). The work done by the normal force



2. The increase in thermal energy is:





Yes,and because not everyone can wink and often that someone can only wink with one eye only
Answer:sofa
Explanation:the weight of the mass of that object can be heavy (er) than the rest