A force of 10,000 N is applied to a stationary wall. How much Work is performed on the wall? Why?

b. latent learning (the word "latent" itself means something that exists but isn't obvious, only under certain conditions! )

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

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.