The free lower end of the rope is struck sharply at time t=0. what is the time t it takes the resulting wave on the rope to travel to the ceiling, be reflected, and return to the lower end of the rope? express your answer in terms of l and constants such as g (the magnitude of the acceleration due to gravity), π, etc.

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.