A 10 ohm, a 30 ohms and two 20 ohm resistors are connected in series a 90 V battery. Find the total resistance.

The energy produced as a result of this flow of electrons from atom to atom is called

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*