Light with a wavelength of 420 nm shines on a metal surface, which emits electrons. The stopping potential is measured to be 0.660 V. a. What is the maximum speed of emitted electrons?b. Calculate the work function. c. Identify the metal.

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

What is the angular momentum of the bar about the axle?

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!