Which of the following statement(s) are true? A. NAND gates output a 1 when each of its inputs is a 1.
B. All circuits can be created using only NOR gates.
C. A circuit with 4 inputs has 16 possible combinations (truth table lines).
D. You should never tie 2 outputs of two distinct circuits together.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?