Increase the mass of blue ball. What happens to the force on the red ball? What happens to the force on the blue ball?

Which statement best describes the flow of energy in this scenario

Which of the following is true about the speed of light? it depends on the wavelength.

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!