When resting, a person has a metabolic rate of about 3.0 105 joules per hour. the person is submerged neck-deep into a tub containing 1.21 103 kg of water at 19.30° c. if the heat from the person goes only into the water, find the water temperature after half an hour.

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).