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2 years ago

Which structure controls how much light passes through the specimen? (please help)

Biology

2 answers:

sweet-ann [11.9K]2 years ago

5 0

Answer: diaphagram

Explanation:

LUCKY_DIMON [66]2 years ago

4 0

Answer:

diaphragm

You can control how much light goes through the specimen by adjusting the diaphragm

Explanation:

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Who devised a technique for determining the blood group of a dried bloodstain, which he applied to criminal investigations?.

Dominik [7]

Landsteiner Bertillon devised a technique for determining the blood group of a dried bloodstain, which he applied to criminal investigations.

<h3>What about blood group?</h3>

According to the presence or absence of antibodies and hereditary antigenic compounds on the surface of red blood cells, blood is classified according to its type.
Depending on the blood group system, these antigens could be proteins, carbohydrates, glycoproteins, or glycolipids.
The genes that a person got from their parents determine what blood type they have.
There are numerous systems for classifying blood types, but ABO is the most popular one.
The ABO group is divided into four main categories: A, B, O, and AB.
There are eight more blood types within these groupings.
Each of the eight blood types has a particular ability to save lives.
The majority of people (37% of the population) have the blood type O+, which is the most prevalent. This indicates that there is a greater need for this blood type for blood transfusions.

Learn more about blood group here:

brainly.com/question/15289194

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6 0

1 year ago

Mars had an orbital period of 1.88 years. In two or more complete sentences,explain how to calculate the average distance from m

Vanyuwa [196]

This is an interesting problem involving astronomy, in fact, simple physics.
Let r=distance of sun to mars, in metres

<span>Mars had an orbital period of 1.88 years.
=>
tangential velocity, v, of the planet, in m/s is
$v=\frac{2\pi{r}}{T}$
</span> $=\frac{2\pi{r}}{1.88*365.25*86400}$ m/s, accounting for leap years
$=3.371*10^{-8}\pi{r}$ m/s

The centripetal force, Fc, generated is
$Fc=\frac{mv^2}{r}$
where m=mass of mars = 6.39*10^(24) kg
$=\frac{mv^2}{r}$
$=\frac{6.39*10^{24}v^2}{r}$
$=7.26168*10^9\pi^2r$

The gravitation pull from the sun, Fg, is given by
$Fg=\frac{GMm}{r^2}$
where G=grav. const., =6.67408*10^(-11) m^3<span> kg^(</span>-1)<span> s^(</span>-2)
M=mass of sun=1.989*10^(30) kg
$=\frac{6.67408*10^{-11}1.989*10^{30}6.39*10^{24}}{r^2}$
$=\frac{8.4826*10^44}{r^2}$

Since the radial distance is in equilibrium, the average distance, r can be found by equation Fc=Fg and solving for r:
Fc=Fg
=>
$7.26168*10^9\pi^2r=\frac{8.4826*10^44}{r^2}$
Solving for the real root:
$r^3=\frac{8.48256*10^44}{7.26168*10^9*%pi^2}$
$=\frac{1.1681263*10^{35}}{\pi^2}$
=2.279*10^11 m

5 0

3 years ago

What is the source of all energy in the pyramid in model 1?

Wittaler [7]

The source of all energy in the pyramid in model one is the hawk

8 0

2 years ago

Which question can be answered by science

OLEGan [10]

Answer:

It's B - How much water is used to produce one paper bag?

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2 years ago

A father has Type B blood, and Grandpa (Dad’s dad) had Type O blood. The mother has type AB blood. What blood types would be rea

notka56 [123]

Blood group AB because the child’s father have pathogen a and mother has both pathogens hence the child will have both pathogen from both parents hence blood group will be AB

4 0

2 years ago