Achild and her mother are at the park. the child walks around the rectangular park while her mom waits on a bench. the child returns to the bench, finishing her walk at the same place she started. the park is 411 meters wide and 475 meters long. what was the displacement of the child?

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.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?