How are biomass feedstocks more flexible than petroleum? Explain
What will be an ideal response?
They are absolutely renewable; they grow every year. Also, the area dedicated to
various feedstock biologicals can be varied from year to year in response to anticipated
demand, whereas chemical feedstocks from conventional sources are generally minerals.
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An ionized atom having Z protons has had all but one of its electrons removed. If R is the radius of the ground state electron orbit in atomic hydrogen, then what is the radius of the shell of the remaining electron in the ionized atom?
A) R B) R/Z2 C) ZR D) Z2R E) R/Z
If the Earth didn't have an atmosphere what would happen to its temperature?
a. It would go up. b. It would go down. c. It wouldn’t change.
Atomic bombs and nuclear power plants both use nuclear fusion
a. True b. False Indicate whether the statement is true or false
Compare two vibrating strings, each has the same tension, but the second has four times the mass density of the first. The wave speed along the 2nd string is how many times the speed along the 1st?
A) 1/4 B) 1/2 C) 4 D) 2 E)