Answer:
April 22, 1970 was the 1st earth day
Answer:
in spring 1970
Explanation:
because of this one person named Gaylord Nelson
The moon's relative motion causes
A)
ocean tides.
B)
wind currents.
the phases of the Moon.
D)
the rotation of the Moon.
Answer: the phases of the moon
Explanation: i did it
HELP DUE BY 10AM HELP ASAP
Answer:
A
Explanation:
Answer: A
Explanation:
The aorta carries blood away from the heart and eventually branches into a large number of capillaries that distribute the blood to various body organs. If for an average person, the aorta has a radius of 1.2 cm and blood travels through it at a speed of 42 cm/s and the capillaries have an average radius of 5.0 10-4 cm and blood travels through them at a speed of 0.005 cm/s, determine the approximate number of capillaries in the human body.
Answer:
There are approximately 5 × 10¹⁰ capillaries in the human body
Explanation:
The motion of a fluid is such that the mass of the fluid flowing remains constant. This is known as the principle of conservation of mass in liquid flow.
The mass flow rate is the mass that passes a given point per unit time. According to the principle of conservation of mass, the flow rates at any two points must be equal, as long as no fluid is being added or taken away.
The principle gives rise tonthe continuity equation which is given below:
ρ₁A₁v₁ = ρ₂A₂v₂
Where ρ is density of fluid, A is internal area of the vessel or pipe the fluid is flowing through, v is velocity of the fluid
Since the density of blood is constant, the continuity equation above reduces to:
A₁v₁ = nA₂v₂
where A₁ is the area of the aorta, v₁ is velocity of bloodmin the aorta, n is number of capillaries, A₂ area of capillary, v₂ is velocity of blood in the capillary.
n = A₁v₁/A₂v₂
n = πr₁² × v₁ / πr₂² × v₂ where r₁ is radius of aorta and r₂ is radius of capillaries
n = (22/7 × 1.2² × 42) / (22/7 × 0.0005² × 0.005)
n = 4.8384 × 10¹⁰capillaries
Therefore, there are approximately 5 × 10¹⁰ capillaries in the human body
Friction reduces efficiency because energy is lost as ____.
a.
work
c.
gravity
b.
heat
d.
thrust
Please select the best answer from the choices provided
A
B
C
D
Answer:
option (b) heat is right answer
PLEASE JUST ANSWER DO NOT ATTACH IMAGE
Which of the following is an example of the endocrine system maintaining homeostasis? (3 points)
-Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response
-Discharging an excessive amount of hormones in the blood and not sending a signal to stop production
-Sending a message to the pituitary gland to start producing a hormone when the levels in the body are too low
-Using sense organs to get information about the outside world and direct an appropriate body response release
Answer:
D
Explanation:
Im not exactly for sure on this one, but if i were you, i would choose either A or D . Homeostasis is like the normal for something when they it isnt sick. Its when they are doing good with not really any concerns!
____________ are made of a series of paired statements that describe physical characteristics of different organisms.
Answer:
taxonomic key
this is A series of paired statements that describe the physical characteristics of differnent organisms.
Answer:
taxonomic key
Explanation:
A series of paired statements that describe the physical characteristics of differnent organisms.
A cell goes through mitosis every 20 minutes. How many cells will there be after 3 hours?
Answer:
Well since a single cell per 20 minutes, it would be 9 cells in 3 hours.
Explanation:
Well since there’s 60 minutes in an hour and 60/20 is 3
3*3 hours is 9
So 9 cells in 3 hours
Due to a extended 5 year drought the seeds became much harder than they were previously which graph would represent how the bird population would change over these years
Answer:
Graph A
Explanation:
With harder seeds, birds will need larger beaks in order to crack the seeds. The birds with smaller beaks won't be able to crack the seeds and will die because they can't eat anything. Graph A is the only one that shows a distinct increase in bird beak size.
The spinning of Earth on its axis is an example of its?
Answer:
Rotation
Explanation:
critically discuss the transport mechanisms across the membrane
Diffusion, osmosis and active transport.
Explanation:
. Diffusion is the movement of substances from a region of high concentration to a region of low concentration across the membrane.
.Osmosis is the movement of water molecules from a hypotonic solution to a hypertonic solution across the membrane.
.Active transport is the movement of substances from a region of low concentration to a region of high concentration across the membrane with the utilization of energy.
Hydrogen bonds are formed as a result of which of the following? A. Ionic bonds b. Nonpolar covalent bonds c. Polar covalent bonds d. None of these are correct
Answer:
C
Explanation:
I believe they're opposite.
How would adding finer particles to the sand affect porosity?
Explanation:
Porosity depends on the size, shape, and mixture of grains and particles that compose soil and rock. For instance, small particles such as clays can compact more closely together, reducing the amount of porosity. However, larger particles such as sand and gravel will have more spaces available between them.
An ecosystem with great biological
diversity decreases –
F the number of species present in
the ecosystem
G competition between different
species in the ecosystem
Havailable space for organisms in
the ecosystem
J available food supply for
organisms in the ecosystem
Answer:
H and J
Explanation:
F With great diversity comes and increase in species
G with an increase of animals there is an increase in competition not a decrease
H and J both seem right since the more animals the more competitive it is for space and food
After a carnivore feeds on an organism, the rest of the dead body is __________.
Select one:
eaten by parasites
used by producers
invaded by viruses
consumed by decomposers
After a carnivore feeds on an organism, the rest of the dead body is: D. consumed by decomposers.
What is a carnivore?A carnivore is also referred to as a carnivorous animal and it can be defined as a type of animal whose food and energy requirements are primarily derived from animal products, especially by hunting and scavenging.
This ultimately implies that, a carnivore is an animal that only feeds on other animals such as deers, cows, zebras, rather than grasses or plants.
In conclusion, decomposers are a group of microorganism such as fungi and bacteria, that consumes the rest of the body of a dead or decaying organism after a carnivore has fed on it.
Read more on carnivore here: brainly.com/question/13571764
Globalization of the economy is increasing because of which of these factors? O A. Agreements limiting immigration OB. A decrease in international travel O C. Treaties expanding international trade O D. A decrease in demand for resources
Answer:
C is the best answer
Explanation:
This answer makes the most sense in the context of globalization.
Globalization of economy is increasing because of Treaties expanding international trades .
What is globalization ?The process by which businesses or other organizations develop international influence or start operating on an international scale can be referred as Globalization.
What are the factors of economic globalization?Three suggested factors accelerated economic globalization:
advancement of science and technology, market oriented economic reforms contributions by multinational corporations.Globalization of economy is increasing because of treaties expanding international trades .
Hence ,option C is correct
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A bacteria structure involved in motility.
Answer:
flagella
Explanation:
Thin long thread like structure that help in locomotion in bacteria.
IF A RED BIRD EATS IN A SPACE OF 500 FT AND A BLUE BIRD HUNTS WITHIN THIS 500 FT, BUT ONLY IN A SQUARE OF 100FT, WHAT MIGHT HAPPEN TO THE BLUE BIRDS POPULATION. IF THE RED BIRD EATS THE BERRIES IN THE 100FT SPACE.
Answer: They will die
Explanation: they will have no food to eat to keep them alive
True of False. The brain is completely dependent on blood sugar to maintain its glycogen stores.
I need it asap
Answer:
False.. the brain is part of the nervous system... thats the circulmatory sytem job..
Explanation:
Answer:
first one
Explanation:
im pretty sure that the answer is true im so sorry if it is wrong.
what is the answer? for this
Answer:
b
Explanation:
because it is the least inclined
describe one similarity and one difference between fungi and plants
Explanation:
Both the plant and fungus kingdoms have some common characteristics. ... While both are eukaryotic and don't move, plants are autotrophic - making their own energy - and have cell walls made of cellulose, but fungi are heterotrophic - taking in food for energy - and have cell walls made of chitin.
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Water is carried from the roots upward to every part of a vascular plant by
cells walls.
O cuticle.
phloem.
xylem
Use the concept map below to answer the following question.
A farmer grows wheat near a river. He frequently uses
fertilizer on his fields, and when he waters the fields,
excess water runs off into the river.
What should the farmer be most careful to monitor to determine his farm's
impact on water quality?
A. Type of fish in the river
B. Amount of water in the farm's soil
C. pH of rainwater falling on the farm
D. Level of nitrates in runoff water
Answer: I think its B
Explanation: I hope this helps :)
Answer:
D. Level of nitrates in runoff water
Explanation:
Took the test too :)
Please help me ASAP thank you
explain the importance of capacity to living organisms
1.
If a person gets a stab wound to the chest cavity where the lungs are located, how
would this affect the person's ability to breathe? Why?
2. Explain how a build-up of mucus in the bronchi can affect your daily activities.
3. Explain how a problem in your respiratory system can affect your circulatory
system
Answer:stop use brainly for cheat n go do your own work
Explanation:
can you live without a spleen
Answer:
Yes
Explanation:
Although the spleen is an important part of the Immune system, you can survive without it, because the liver can also have the same functions of a spleen. Although the liver can take over these functions it cant prevent all the bacteria that a spleen can prevent.
Ashton is a crime scene investigator. He ensures that all the evidence gathered at the scene is properly handled and labeled. What is Ashton protecting?
Ashton ensures that the (blank) the documentation of who possesses evidence at all times, is protected by properly handling and labeling evidence.
when it says (blank) it means evidence evidence.
Water located in wells underground is
A
run-off.
B
precipitation
с
ground water.
D
condensation.
Answer:
Aquifers but since there is no answer choice I say groundwater .
Hope this helps .
Water located in wells underground is ground water. Therefore, the correct option is option C.
Water that is found below the earth's surface in cracks in rocks and the crevices between soil particles is known as groundwater. It is essential for maintaining ecosystems on our planet and supporting human activities. Groundwater is created and made available by precipitation and surface water that seeps into the ground. It gathers in subterranean aquifers, which are enormous water reservoirs contained in permeable rocks or sediments. The thickness and depth of these aquifers vary. Groundwater supply is influenced by elements like rainfall, geology, and human use. Groundwater is an important resource since it is necessary for a variety of purposes. It provides over half of the world's population with their main supply of drinking water.
Therefore, the correct option is option C.
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The rotation of the earth causes winds to shift and ocean currents to change. This is an example of?
A) inertia.
B) cyclones.
C) acceleration.
D) topographical variation
Answer:
d) topographical variation
Explanation:
Select all that apply.
Tumors can result from:
1) Mutations in tumor suppressor genes
2) Mutations in proto-oncogenes
3) Too many cells in GO
4) Too little cell death
5) Too much cell division