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2 years ago

How do plants obtain carbon dioxide?

Biology

2 answers:

irina [24]2 years ago

5 0

The answer is b I hope this helps

Mila [183]2 years ago

4 0

Answer:

C. They absorb it out of the air.

Explanation:

We breathe it out, plants breathe it in.

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A 20-pound object is dropped from a 50-foot bridge onto the ground below it. A 50-pound object is dropped from a 100-foot cliff

ira [324]

The 50 pound object will reach the ground first.

Explanation:

Using the second equation of motion, we can derive the time taken for each of the object to reach the ground. As the object is thrown from the top of the bridge or cliff, acceleration due to gravity will be acting on them.

So, $s = ut+\frac{1}{2} at^{2}$

The value of s for the object thrown from 50 foot bridge is given as 50 ft. The initial velocity of the object will be zero. The acceleration can be written as the ratio of mass to gravitational force.

Then, $s = (0) t +\frac{1}{2}*\frac{m}{F}*t^{2}$

$50 = \frac{20}{2F} t^{2} \\\\t^{2} = \frac{100F}{20}$

$t = \sqrt{5F}$

Then, consider the time taken for the 50 pound object to reach the bottom of 100 ft cliff as t₁ and the displacement in this case is 100 ft.

Then, $100 = (0)t +\frac{1}{2}*\frac{50}{F}*t_{1}^{2} \\\\t_{1}^{2} =\frac{200F}{50}$

$t_{1} = 2 \sqrt{F}$

Since, the gravitational force acting on both the objects will be same, the ratio of time taken is

$\frac{t }{t_{1} }=\frac{\sqrt{5F} }{2\sqrt{F}} = \frac{\sqrt{5} }{2}$

So, the time taken for the 20 pound object to reach the ground of 50 ft bridge is √5 s =2.236 s and the time taken for the 50 pound object to reach the ground of 100 ft cliff is 2 s.

Thus, the 50 pound object will reach the ground first.

5 0

3 years ago

In the 1960s the molecular biologist George Streisinger developed the strand- slippage hypothesis. Streisinger noticed that muta

Lesechka [4]

The insertion mutation affect the DNA by changing certain cells

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3 years ago

True or false a theory is a scientific idea that has been proven true

mr_godi [17]

Answer:

true

Explanation:

i hove this will help u

6 0

3 years ago

Hi, biology help needed! Thanks for the help!

lord [1]

Answer:

Question 1: C Messenger RNA

Question 2: D GAC CTT GAT

Question 3: B 20 chromosomes

Question 4: C 75% gray, 25% ebony

Question 5: sperm cells

Hope this helps! :)

Explanation:

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3 years ago

Lipid molecules are <br><br>(a) acidic (b) basic (c) alkaline (d) amphipathic

kiruha [24]

Answer:

Explanation:

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3 years ago

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