Uranium-235 is used as fuel in nuclear power plants. Natural ore containig 0.7% uranium nees to be enriched, or concentrated , to 3.5% to be used in power plants. How many more times is the uranium concentration in the power plants than in natural ore?

a. 0.2
b. 5.0
c. 4.2
d 2.8

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

The process of predicting values that extend beyond the range of data points is called absolute value extrapolation interpolation prediction for any given: )