1. Is a chain reaction more likely to occur in two separate pieces of uranium-235 or in the same pieces stuck together? 2. How is a nuclear reactor similar to a conventional fossilfuel power plant?...

1. Is a chain reaction more likely to occur in two separate pieces of uranium-235 or in the same pieces stuck together?

2. How is a nuclear reactor similar to a conventional fossilfuel power plant? How is it different?

3. Who discovered that energy and mass are two different forms of the same thing?