Technician a says that the two types of dial indicator faces are balanced and continuous read out. technician b says that a balanced dial indicator face will have a plus or minus reading. which technician is correct?

both A and B.

Explanation:

Here both the Technician A and B are correct. That is at the two types of dial indicator faces are balanced and continuous read out.

And also, that a balanced dial indicator face will have a plus or minus reading.

Balance dial indicator  are generally used for quality analysis in manufacturing process.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

this could be newton#'s law of cooling. the cooling curve is exponential