To obtain a maximum effectiveness in a heat exchanger while keeping all other parameters constant except the hot stream flow rate,
a- increase the mass flow rate of hot stream more than cold stream flow rate
b- decrease the mass flow rate of hot stream less than cold stream flow rate
c- none of the above

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

answer///carbon;