I need answers ASAP. Calculate the net force, indicate if the forces are balanced or unbalanced, indicate whether or not the object accelerates. I put the image below, answer a b and c separately, Thanks

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

Ms.hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?