Ilean against a wall, applying force. which could be described as the “reaction force? ”

a. my force against the wall
b. the walls force against me
c. the force of gravity
d. no reaction
e. not enough information

What is the answer for this. the correct answer only

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

Distinguish between a transverse wave and a longitudinal wave.