Spider crab and algae: Spider crabs live in shallow areas of the ocean floor, and greenish-brown algae ves on the crabs' backs, making the crabs blend in with their environment, and unnoticeable to predators The algae get a good place to live, and the crab gets camouflage. organism 1: helped harmed not harmed/not helped .
organism 2: helped harmed not harmed/not helped
symbiotic Relationship:​

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)