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allsm [11]
3 years ago
7

The production of electricity from fission nuclear reactions in power plants is regulated by controlling

Physics
2 answers:
marin [14]3 years ago
4 0

Answer:

option (D)

Explanation:

It is controlled by the amount of neutrons available.

The rate of fission of heavy element is controlled by the number the number of neutrons. in the fission reaction of Uranium - 235, when one neutron is bombarded on one Uranium 235, three neutrons, small elements along with lot of energy is produced. Now three neutrons bombard three Uranium 235 atoms so that the lot of amount of energy is liberated. it is called uncontrolled chain reaction.

When the number of neutrons are absorbed and only one neutron is available for fission, then energy is in controlled manner and it is called controlled fission reaction. In this reaction, controlled amount of energy is released.

Anna007 [38]3 years ago
3 0
D. or "the amount of neutrons available. 
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Which of the following is not considered a major work flow structure?
mixas84 [53]

Answer:

The correct option is;

D. Fabrication

Explanation:

A workflow flow is a detailed business process consisting of a series of required interconnected tasks in  directed graph format  that is executable by  workflow management system.

Considering each of the options, we have

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E. Continuous flow

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3 years ago
a student that just received their driver's license decides to buy a new car. he remembers from physics class that heat engines
blsea [12.9K]

Answer: the first law of thermodynamics

Explanation:

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D. When Alan's puck is moving at 21 m/s south, it collides
kirza4 [7]
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Which has the greater change in momentum, a 50 gram clay ball that strikes a wall at 1 m/s and sticks or a 50 gram superball tha
jek_recluse [69]

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Explanation:

50 gram superball that strikes the wall at 1 m/s and bounces away at 0.8 m/s has the greater change in kinetic energy because the collision is elastic in nature that is bodies separates after collision and doesn't lose any kinetic energy.

Also for an elastic collision, both the momentum and energy of the bodies are conserved compare to inelastic collision where only momentum is conserved but not the kinetic energy(this is attributed to bodies that sticks together after collision).

5 0
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A ball is held at a height H above a floor. It is then released and falls to the floor. If air resistance can be ignored, which
Vaselesa [24]

Answer:

Straight line graph attached showing mechanical energy on x-axis and altitude y on y-axis

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As mechanical energy is the sum of kinetic energy and potential energy, the ball at a height H possesses potential energy= m.g.H

and Kinetic energy= 0.

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When the ball starts moving, the height starts to decrease and potential energy also decreases with decreasing y. On the other hand kinetic energy starts increasing with decreasing Y. But their sum remains constant i.e equal to mechanical energy. It remains same until the ball touches the ground. The graph attached shows height H or altitude y on x-axis and Mechanical Energy on y-axis. It shows a straight horizental line showing that mechanical energy remains same as y decreases.  

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3 years ago
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