What happens to the orbit of earth when the mass of the sun is reduced to 75,000? a. the orbit does not change c. the orbit gets larger b. the orbit gets smaller d. the sun begins to orbit the earth

the answer is C)the orbit gets larger (just took the test)

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.