Thank you for all the help.
My 9-year-old son listened carefully as I read everything to him. I'm not sure he grasped it all, but at least, he nodded his head in the right places.
Thanks again for the explanation and the links to other resources.
Steve
My 9-year-old son has a physics questions that I couldn't answer...
Energy or mass can create a gravitational field, so what happens if someone goes the speed of light. Will this person create a gravitational field of their own and be able to pull someone else along with them?
What is the...