A digital-to-analog converter (DAC):

a. converters a digital value to a representative physical analog value

b. converts the digital output of a system to a corresponding analog representation,

c. converts the analog input from a transducer or some other device to a representative digital input for a digital dsystem.

d. monitors the digital representation of an analog value during the computer's program execution.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

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?

What is a monomer? how do they form a ploymer from the view point of chemical bonding?