We can only see the "Visible region" of Electromagnetic spectrum
Hope this helps!
Resolving vectors question. See diagram enclosed.
I believe that says that the car is going 125 meter per 5 seconds
That relationship is as DIRECT as you can get.
The process that produces the energy radiated by stars is nuclear fusion in the core.
For a star on the main sequence, it's the fusion of hydrogen nuclei into helium.