If someone was concerned about the amount of radiation they receive from nuclear weapons testing, how could you use above pie-chart to reassure them?

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Could we see a galaxy that is 20 billion light-years away?