The ocean thermal energy conversion project uses the surface water near tropical islands with a temperature of 20C as the hot temperature reservoir,
and the water at some depth, with a temperature of 5.0C, as the cold temperature reservoir for a heat engine. What is the maximum possible efficiency of an engine running between those two temperatures?
A) 30 B) 4.7 C) 7.9 D) 15 E) 5.1
Question 2
Alicia intends to swim to a point straight across a 100 m wide river with a current that flows at 1.2 m/s. She can swim 2.5 m/s in still water. At what angle, measured from the upstream direction, must she swim upstream to achieve her goal?
What will be an ideal response?
Walruses leaving the water
Parts of the Hand Used in Palpation; Dorsal Surface
The Sun as it appears from the surface of the Earth at Sunset.
Minerals and Water
Most Americans obtain their drinking water from a community water system
Energy Transfer