Limiting Factors and Humans

Question 1

Uranium-235 undergoes fission to produce two neutrons per fission event. A neutron-absorbing material is mixed in with this sample. This causes the number of neutrons that can initiate fission events to decrease. Which of the following will be effective at achieving a critical mass? Check all that apply.

Revolt · Accepted Answer

A: Surround the sample with a deflective material to prevent neutrons from escaping to the surroundings.; C: Compress the uranium-235 sample.

Question 2

Americium-241 undergoes fission to produce three neutrons per fission event. A change occurred that caused the rate of fission to increase. Which will be effective at achieving a critial mass? Check all that apply.

Revolt · Accepted Answer

A: Remove a deflective shield surrounding the sample.

Question 3

When a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. What needs to be done to meet this increased demand?

Revolt · Accepted Answer

B: raising the control rods

Question 4

What are the advantages and disadvantages of nuclear power? Check all that apply.

Revolt · Accepted Answer

A: One advantage of nuclear energy is that it does not produce carbon dioxide emissions.; D: Safe operation of a nuclear power plant can be jeopardized by a human mistake.

Question 5

When the heat wave passes and temperatures become mild, electrical demand decreases. What needs to be done to reduce electricity output in response to this decreased demand?

Revolt · Accepted Answer

A: lowering the control rods

Limiting Factors and Humans Answers

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