I NEED HELP PLEASE!

What is the Reynolds number for blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood

defon

Answer:

b. laminar flow

the reynold number is 1329.26

Explanation:

Re = (V x D x ρ)/ η

where,

V = mean velocity = 15.9 cm/s = 0.159m/s

D = vessel diameter = 2.15cm = 0.0215m

ρ = blood density = 1050 kg/m3 = 0.00105 kg/cm3

η = dynamic viscousity= 2.70 × 10-3 Pa·s = 2.70 × 10-3 kg/m-s

applying the formular to calculate for reynolds number, Re =

Re = (V x D x ρ)/ η

=(0.159 x 0.0215 x 1050) / 2.70 × 10-3

=3.589/0.0027 = 1329.26

the Reynolds number for the blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood has a dynamic viscosity of 2.70 × 10-3 Pa·s, a density of 1050 kg/m3, and travels at a mean fluid velocity of 15.9 cm/s is 1329.26

which flow through the aorta in a Laminar flow

Note that

a) turbulen= Re >4000

b) laminar= Re <2300

c) transitioning between laminar and turbulen= Re between 2100 and 4000

3 0

3 years ago

Which causes an increase in greenhouse gasses

____ [38]

Answer:

Sun.

Explanation:

The Sun and other gasses work together and increase the greenhouse gasses.

3 0

4 years ago

In plants tall (T) is dominant to short (t) and round seed is dominant to wrinkled seeds (r). If a parent is short and wrinkled

Nuetrik [128]

Answer:

Parent cross= ttrr (short, wrinkled) × TtRr (hybrid)

POSSIBLE GAMETES BY EACH PARENT:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

Explanation:

This question involves two genes in a certain plant. One gene is coding for height while the other is coding for seed shape. The alleles for tallness (T) and round seeds (R) is dominant over the alleles for shortness (t) and wrinkled seeds (r).

According to this question, a parent that is short and wrinkled (ttrr) is crossed with another parent that is hybrid (TtRr) for both traits. This means that the parent cross is as follows: ttrr × TtRr

The possible combination of gametes that will be produced by each parent is as follows:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

See attached image for the punnet square using these gametes.

6 0

3 years ago

Which of the following scenarios are examples of positive-feedback mechanisms? Check all that are correct.

solong [7]

Answer:

Option (1), (3) and (5).

Explanation:

Positive feedback mechanism also exist in the environment that increases the causative effect of the environment. The environment can change the temperature, precipitation and other climatic conditions of the area.

The lack of moisture in Sahara desert and deforestation can cause the trees extinction. The temperature can be increased by the green house gases as the warm atmosphere causes evaporation. The snow gets melted due to increase in temperature and the ground becomes more darker.

Thus, the correct answer is option (1), (3) and (5).

5 0

4 years ago

What is the relationship between science and pseudoscience

tino4ka555 [31]

<span>Science has to do with </span><span>the systematic study of the natural world through observation and experiments as well as the behavior of the physical aspects.

Pseudoscience is based on a collection of beliefs or practice such as horror scopes or palm reading for example the people would like to believe are true but cannot be scientifically proven.

The relationship between the two co-exist to help explain the world around us rather it can be by facts or not, it still tries to best explain the natural world.

</span>

8 0

3 years ago