A)Find the DC noise margin for the TTL-LS 74LS** or 54 LS ** logic family using the data sheet provided (Blackboard)or a similar one that you find on-line. Circle the voltage values that you used on the data sheet. b) Calculate the Fan-Out for this circuit. Circle the current value that you used on the data sheet.

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?