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## The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated.

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The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated.

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## What is the name of the device that regulates the amount of fuel going into the engine of a personal watercraft (pwc)?

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In order to get a sample of air that is 23 km above the ground, the rocket must rise by that height.

Draw a diagram (shown below) t represent the problem.

The distance h₁ is traveled from A to B with an upward acceleration of 17 m/s² over 30 s. The distance traveled is
h₁ = (1/2)(17 m/s²)(30 s)² = 7650 m = 7.65 km

At point B, the velocity attained is
V = (17 m/s²)30s) = 510 m/s

The distance h₂ is traveled from B to C with gravitational deceleration of -9.8 m/s². The distance traveled is given by
(510 m/s)² – 2(9.8 m/s²)h₂ = 0
h₂ = 13270.4 m = 13.27 km

The total height attained by the rocket is
h₁ + h₂ = 7.65 + 13.27 = 20.92 km

This height falls short of the desired height of 23 km.

Answer:
The rocket does not travel high enough to sample the air at a height of 23 km.

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## What makes the pituitary gland the most important gland of the endocrine system? A) it is the largest endocrine gland in our body. B) of secrets hormones in large volumes. C) it regulates many organs and other endocrine glands.

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What makes the pituitary gland the most important gland of the endocrine system? A) it is the largest endocrine gland in our body. B) of secrets hormones in large volumes. C) it regulates many organs and other endocrine glands.

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## Which organ secretes a hormone that regulates the rate of metabolism in the human body

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Which organ secretes a hormone that regulates the rate of metabolism in the human body

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## Which of the following actions is most typical of foreign policy intervention? A.The president proposes a tax cut. B.A task force is asked to investigate a possible free trade violation. C. The U.S. Environmental Protection Agency regulates automobile emissions. D.A new healthcare bill is passed in the Senate.

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Answer:

Prevent African Americans from exercising their right to vote.

Explanation:

The 15th Amendment to the U.S. Constitution (1870) granted the right to vote to all Americans regardless of their race, for the first time, which included African American, who had been harshly discriminated and mistreated for decades. This was a big step to put a halt on discrimination and gain equality of rights. However, in reality, many white Americans, especially Southerners, fiercely opposed to fully include black people as equal in society. Consequently, they began to enact a series of acts that prevented them from exercise their rights.

Some of the many legislation that Southern states passed during this “Jim Crow era” to prevent African Americans from exercising their right to vote was to impose poll taxes, which sometimes black people could not pay, and to force them to take literacy tests as a requirement to vote, which, again, they often failed.

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