1. An athlete running at the velocity of 23m/s due east is confronted with two trade winds. One wind traveling at 10m/s in a direction of N 65⁰ E and the other wind traveling at 8m/s in a direction S 70° E. Find the resultant velocity and direction of the athlete.​

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

How can you measure the amplitude of a longitudinal wave?