How can the velocity of an object at any given instant in time be determined from a velocity-time graph of its motion?

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?