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Masja [62]
2 years ago
8

Why arteries have thick and elastic muscular walls?

Biology
1 answer:
valkas [14]2 years ago
4 0

The thick, elastic walls allow the heart to withstand the pressure waves from the strong blood pressure. Veins have thinner ones because they don't receive much pressure.

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Pleaaase help , and show work if you can
charle [14.2K]

Answer:

1. 39 J; 2. 3.9 % usable; 3. 96.1 % unusable

Step-by-step explanation:

1. Available energy

Energy consumed              = 1000 J

Less waste         = - 177 J

Less respiration = <u>-784 J </u>

Total energy lost                = <u>-961 J </u>

Available energy                =   39 J

2. Percent of total energy usable

The chipmunk could use only 39 J of the original 1000 J.

% of energy usable = 39 J/1000 J × 100 % = 3.9 %

3. Percent of energy unusable

The chipmunk lost 961 J of the original 1000 J.

% of energy unusable = 961 J/1000 J × 100 % = 96.1 %

6 0
2 years ago
A dihybrid cross is performed between plants that differ in two Mendelian traits: Stem length (T or t) and flower coloration (R
Dahasolnce [82]

Answer:

A. 3/16

Explanation:

The four possible outcomes for Stem length are:

Tt, tT, TT and tt.

The dominant trait (tall stems) will manifest itself in 3 out of 4 outcomes, so its ratio is 3/4.

The four possible outcomes for flower coloration are:

Rr, rR, RR and rr.

The non-dominant trait (white flowers) will manifest itself in 1 out of 4 outcomes, so its ratio is 1/4.

Multiplying both ratios gives us the ratio of offspring that have tall stems and white flowers:

\frac{3}{4}*\frac{1}{4}=\frac{3}{16}

Therefore, the answer is A. 3/16

4 0
2 years ago
4/10
grin007 [14]

The gravitational potential energy of Sara at the given height is 10594.8J.

Given the data in the question;

  • Mass of Sara; m; = 60kg
  • Distance from ground; h = 18m
  • Acceleration due to gravity; g = 9.81m/s^2
  • Gravitational potential energy; U = \ ?

<h3>Gravitational Potential Energy</h3>

Gravitational potential energy is the potential energy an object with mass posessses relative to another object with mass due to gravity.

It is expressed as;

U = mgh

Where m is mass, h is height and g is acceleration due to gravity.

To determine the gravitational potential energy of Sara, we substitute our given values into the expression above.

U = mgh\\\\U = 60kg * 9.81m/s^2 * 18m\\\\U = 10594.8kgm^2/s^2\\\\U = 10594.8J

Therefore, the gravitational potential energy of Sara at the given height is 10594.8J.

Learn more about gravitational potential energy: brainly.com/question/3910603

8 0
2 years ago
Can someone give me 4 examples of physical weathering
valkas [14]
Yes, sure!

1) Moving Water - Water, when running for a long period of time, can actually start to weather rocks.

2) <span>Ice wedging - Yep, this can cause rocks to weather as well. Water, when being constantly frozen and unfrozen weathers the rock due to the fact that water is able to expand.
</span>
3) Plant Roots - Ah, these little nutrient grabbers can certainly weather rocks over periods of time.

4) Winds - Winds can certainly physically weather the rocks, and it's probably the most common way they do.


<span>P.S. If this answer helped you, please, make sure to say "Thanks" just below my answer. It will help me a lot</span>
4 0
3 years ago
Synthesis where water is removed and two compounds bond together
alukav5142 [94]
The correct answer is dehydration. Hope this helps.

7 0
3 years ago
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