The ocean floor is currently the main supply source for manganese
What will be an ideal response?
The ocean floor is the main supply of concentrated manganese, but deposits exist
on land and these supply the bulk of the manganese used worldwide.
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The GAIA mission obtains astrometric data of stars with accuracy in some cases better than 10 microarcseconds. In terms of angular width, what is this equal to?
A) A human hair viewed from a distance of 20 miles B) A human hair viewed from a distance of 200 miles C) A human hair viewed from a distance of 2000 miles D) A human hair viewed from a distance of 20000 miles
What features are unique to Earth?
A. an atmosphere B. precipitation C. volcanoes D. canyons E. None of these features is unique to Earth.
If we accelerate a radioactive isotope of an element in a particle accelerator to a speed close to that of light, what would its observed rate of decay be compared to its rate of decay at rest?
A) faster B) slower C) infinite D) zero
When an ideal gas adiabatically expands
A. the temperature of the gas changes. B. the internal energy of the gas does not change. C. work is not done on or by the gas. D. no heat is given off or taken in by the gas.