You add 50ml of water at 10 degrees c to 50 ml of water at 80 degrees c. what is the most likely final temperature of the mixture ?

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?

For which pair of objects would adding the same a

Which situation will produce the greatest change of momentum