To move a heavy couch across a carpeted living room, what could be used to
decrease the frictional force.
Check all that apply.
A. Push harder on the couch.
B. Attach wheels to the bottom of the couch so it rolls.
C. Lay smooth cardboard along the carpet to reduce the coefficient
of friction
O D. Have a friend sit on the couch.

a is the answer to this question

explanation:

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.