Answer:
Socially or economically disadvantaged subjects should be excluded from research protocols that are not designed specifically for them, Option A.
Explanation:
A 'vulnerable population' is a group of individuals who need greater protection than the normal individuals in case they participate in a research, because a research may require include some risks. This type of population includes pregnant women, neonates, children, economically pr socially disadvantaged. Even who are terminally ill are included in such type of population.
They should not be included in research that are not meant specifically for them. They should not included by paying them a nominal amount or for phase 1 as stated in other options.
The object must move with the speed of 
times to approximately seeing that it is contracted to exactly half of its actual length.
<h3>How is this calculated?</h3>
The length contraction experimented by the object as it approaches lightspeed, in meters per second, is described by Lorentz contraction formula:
Here, v is the current speed m/s
c is the speed of light in m/s
L' is the length of the object at rest in m
L is the length of the object at the current speed in m
Now we know that
and 
then,
Hence, r = 
Therefore, the answer is the object must travel at a speed of times the lightspeed to be contracted to one-half its proper length.
To know more about the Lorentz contraction formula, visit:
brainly.com/question/17407131
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I think it does because people tend to shorthand words like "for" to "4" and "you" to "U." sometimes people become overreliant on stuff like that and they use it even in school or in situations where the shouldn't. grammar online is pretty bad in general too.
The holy trinity is a Christian belief that God, Jesus, and the Holy Spirit are all one
