A weight of 8.7 N is attached to a spring that has a spring constant of 190 N/m. How much will the spring stretch?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

What element has similar physical and chemical properties as boron.

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.