The ocean thermal energy conversion project uses the surface water near tropical islands with a temperature of 20°C as the hot temperature reservoir,
and the water at some depth, with a temperature of 5.0°C, 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%
E
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If you hold two objects that have the same weight density, then they
A) may have unequal mass densities. B) have equal mass densities. C) are equal in weight.
The maximum value of the electric field in an electromagnetic wave is 1.5 V/m. What is the maximum value of the magnetic field associated with this wave?
A) 3.0 nT B) 4.0 nT C) 5.0 nT D) 6.0 nT E) 7.0 nT
An element found in another galaxy exists as two isotopes. If 80.0 percent of the atoms have an atomic mass of 80.00 atomic mass units and the other 20.0 percent have an atomic mass of 82.00 atomic mass units, what is the atomic mass of the element?
A) 81.0 atomic mass units B) 64.0 atomic mass units C) 80.4 atomic mass units D) 16.4 atomic mass units E) 81.6 atomic mass units
Throughout your website, vary the use of navigation menus, bars, and tabs to provide interest and contrast to visitors.
Answer the following statement true (T) or false (F)