two technicians are discussing the filling of an air conditioning system, technician a says that to add small amounts of refrigerant slowly into a system, a liquid charging method is recommended. technician b says that on smaller systems, liquid charging is usually done with the unit running. which is correct

that would be because of both gravity and friction. so     c

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.