.Name a mission to Mars that will send a spacecraft to collect rock samples on the surface of the planet. What is the name and the launch date of this spacecraft?

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

Wiy doeres rere okhn a pump whon working betwon the same pressure range?