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Advocard [28]
3 years ago
5

In a nuclear power plant, the nuclear reaction is kept from going critical by keeping the rate of reaction safe. How do the cont

rol rods figure into this?
A. The controls rods absorb the excess heat produced in the reaction.
B. The controls rods absorb excess neutrons, keeping them from causing too many uranium atoms to split too quickly.
C. The control rods provide additional neutrons to keep the reaction going.
D. The control rods absorb excess uranium atoms so that the reaction doesn't happen too quickly.
Physics
2 answers:
horsena [70]3 years ago
5 0

Correct answer is B

Explanation:

Control rods in Nuclear reactor:

During nuclear reaction when a heavy nucleus break up into two light nuclei that time neutron are release and these neutrons further break up other nucleus which release more neutrons which lead to a chain reaction. the nuclear reaction is kept from going critical by keeping the rate of reaction safe by using control rods. Controls rods absorb excess neutrons, keeping them from causing too many uranium atoms to split too quickly.

stepan [7]3 years ago
3 0
I think its B. Sorry if Im wrong.
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Answer:

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The object is projected upward with an initial velocity of

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The equation that describes its height at time t is

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In order to find the time it takes for the object to reach the maximum height, we must find an expression for its velocity at time t, which can be found by calculating the derivative of the position, s(t):

v(t) = s'(t) = -32t +144 (2)

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Substituting into the equation above, we find the corresponding time at which the object reaches the maximum height:

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And by substituting this value into eq.(1), we also find the maximum height:

s(t) = -16(4.5)^2+144(4.5)=324 ft

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