Which of these is an example of acceleration ?

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.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter