Why do stores still sell those 1.5 volt batteries that are like three times the size of other 1.5 volt batteries. What is the point of having a bigger battery if it's the same voltage? If anything, wouldn't the smaller battery be more favorable?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0