[Q]: John works as a mechanical engineer in the auto industry. He is testing three surfaces, surface A, surface B, and surface C for their usability. Surface A has a gentler slope, surface B has a steeper slope, and surface C doesn't have any sloping. He needs to figure out advantages and disadvantages of each slope. Which surface would have mechanical advantage greater than 1, surface A or surface C?
****
[A]: surface A

[Q]: John is conducting an experiment in his chemistry lab. His goal is to find a chemical solution that can regulate temperature. To that end, he considered two processes, process A and process B. Process A is an exothermic process, but process B is an endothermic process. In which process the solution would be colder, process A or process B?
****
[A]: process B

[Q]: Alex and Bob both took their cars to a mechanic because they were having engine troubles. The mechanic decided that both need the water in their radiator replaced. The mechanic added a large amount of antifreeze to the water he put into Alex's radiator. Because he wanted to save money, the mechanic only added a small amount of antifreeze to the water he placed into Bob's radiator. Which person's radiator, Alex's or Bob's, would have water with a higher boiling point?
****
[A]: Alex's

[Q]: People from two villages ate lots of salt. People from Salt village used regular salt, while people from Sand village people used iodized salt in their diets, after talking to specialists. Which village had more people experience mental retardation?
****
[A]:
Salt