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nevsk [136]
3 years ago
13

Which shows evidence of active transport?

Physics
2 answers:
Sunny_sXe [5.5K]3 years ago
5 0

Answer: D

X and Y

Explanation:

X The least amount of magnesium Took in magnesium

Y Slightly less magnesium than the cell Took in magnesium

Because active transport occurs when ions or molecules move from less concentration region to high concentration region through semi membrane with the help of some energy.

Varvara68 [4.7K]3 years ago
5 0

Answer:

Cells X and Y

Explanation:

Active transport occurs when a substance moves across a membrane against its concentration gradient.

Cells W and Z were placed in a liquid containing more magnesium than the cells. Magnesium therefore, diffuses passively down it's concentration gradient into the cells.

However, cells X and Y were placed in a solution containing less magnesium than the cells, yet these cells took in magnesium against this concentration gradient. This, shows that active transport had taken place.

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When the acceleration of a mass on a spring is zero, the velocity is at a
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1) Maximum

2) Maximum

Explanation:

The force acting on a mass on a spring is given by Hooke's law; in magnitude:

F=kx

where

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F=ma

where

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So we can write the equation as

ma=kx (1)

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On the other hand, we know that the total mechanical energy of the system mass-spring is constant, and it is given by

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where the first term is the elastic potential energy while the second term is the kinetic energy, and where

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Therefore this means that:

- When acceleration increases, velocity decreases

- When acceleration decreases, velocity increases

Therefore, the two answers here are:

- When the acceleration of a mass on a spring is zero, the velocity is at a  maximum

When the velocity of a mass on a spring is zero, the acceleration is at a  maximum

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3 years ago
What are the 2 types of crystallization ?
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Answer:

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