Bee hummingbird, zunzuncito or Helena hummingbird (Mellisuga helenae) is a species of hummingbird which is the world's smallest bird and the smallest known dinosaur. It is native to Cuba.
suppose you and a friend are making iced tea using identical glasses. You both use the same amount of water, and the water temperature is the same in both glasses. Explain how you can tell who added more ice tea mix to the glass.
Answer:
Iced-Tea Problem
220 g of 35˚C tea (water) is poured over 250 g of -10˚C ice.
What happens...
The warm water (tea) will cool down to 0˚C. As it cools the ice will heat up to 0˚C and then start to melt.
There is plenty of ice however and only a portion of it will melt. Find the amount of ice that melts into water
and you’ll know the final composition and even the dilution factor on the tea.
Cool tea water down to 0˚C
4.184 J/g˚C · 220 g · 35˚C = 32216.8 J removed to cool tea to 0˚C
Warm ice up to 0˚C
2.09 J/g˚C · 250 g · 10˚C = 5225 J to heat ice up to 0˚C
This heat comes from the cooling water, so substract this amount off the total above
32216.8 - 5225 = 26991.8 J of heat that will MELT the ice
mass of ice melted = 26991.8 / 334 = 80.8 g of ice melted
220 g + 80.8 = 300.8 g of water
250 g - 80.8 = 169.2 g of ice
final mixture for
my glass of iced
tea all at 0˚C
220.0 g original tea
300.8 g final tea
The dilution factor is simply the original volume
over the final volume (or masses here ). = .731 or 73.1%
of the original
concentration
If I’m going to get a dilution of 73.1%, I should
compensate by mixing my tea in 26.9% LESS
volume than the directions state. So I will not dilute
the tea to 2 quarts (64 oz), but rather to 1.462
quarts (46.8 oz).
It’s hot and I want a glass of iced tea as soon as possible. The directions for my tea say to boil some water,
add 2 tea bags (these are the big bags), steep for 4-5 minutes, then add enough water to make 2 quarts which
turns out to be a pitcher of tea. However, if I make this tea the exact concentration I want now, when I pour
it over ice the ice will melt (because the tea will still be quite warm) and my tea will be too dilute. So I
calculate how much stronger I should make the tea KNOWING I will pour the warm tea over ice to make
my glass of iced tea.
(a). What is the final temperature and composition of the glass of iced-tea?
(b). What will be the concentration of the tea relative to the original concentration?
(c). How concentrated should I mix the tea knowing that it will be diluted when
poured over the ice?
(a)
(c)
(b)
only 73.1% of the full
amount to compensate
for dilution
What is molecular gastronomy? (Explain in your own words:))
Answer:
molecular gastronomy, the scientific discipline concerned with the physical and chemical transformations that occur during cooking. The name is sometimes mistakenly given to the application of scientific knowledge to the creation of new dishes and culinary techniques.
Compare and contrast the immune system and nervous systems
similarities:
The immune system and the nervous system maintain extensive communication, including 'hardwiring' of sympathetic and parasympathetic nerves to lymphoid organs. Neurotransmitters such as acetylcholine, norepinephrine, vasoactive intestinal peptide, substance P and histamine modulate immune activity.
A man and woman have a son who is color blind, a recessive sex-linked trait carried on the X chromosome, but neither parent is color blind. The woman is now pregnant with their second child. Which of the following statements is true about the second child?
A daughter will be color blind because the father is a carrier of the recessive allele.
A son will be color blind because the mother is a carrier of the recessive allele.
A daughter will not be color blind because the father is not a carrier of the recessive allele.
A son will be color blind because the father's mother must have been a carrier for recessive allele.
Answer:
B. A son will be colour blind because the mother is a carrier of the recessive allele.
Answer: The answer is B
Explanation: The son will be color blind because the mother is a carrier of the recessive allele.
Hope this was helpful
Compare the functions of the male and female reproductive systems.
Explanation:
The main difference between male and female reproductive system is that male reproductive system produces and delivers sperms to the female reproductive system whereas female reproductive system facilitates fertilization and develops the baby.
What is one property of a senescent cell?(1 point)
It can no longer divide.
It can grow and divide rapidly.
It can live for a very long time.
It can no longer be replaced.
What is one property of a senescent cell:
~It can no longer be replaced
Hope this helped you- have a good day bro cya)
One property of a senescent cell is that it can no longer divide.
Senescent cells are cells which help in tissue development in an embryo and also helps to promote healing of injuries.
These cells however exhibit a very a large lysosomal activity which destroys
vital components in the molecules . This thereby prevents the senescent
cells from not being able to divide.
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GIVING BRAINLIEST! Help please!
How are COASTAL ECOSYSTEMS a major source of Oxygen for the rest of Earth’s water??!
Please don’t copy off internet!
Coastal ecosystems gives aprox. 50% of the earth's oxygen. This is due to the variety of plants that live in their water, example of these are phytoplankton and algae
The coastal ecosystem is a major source of oxygen, because of the presence of plankton, plants, algae, and bacteria that can perform photosynthesize.
What is a coastal ecosystem?A coastal ecosystem is the marine coastal ecosystem. It is the ecosystem where area and the land meet. It includes marine habitats, marine animals, mangroves, algae, backwater, etc.
The coastal ecosystem constitutes 50 to 80% of the earth's oxygen because of the presence of organisms in the region.
Thus, because of the existence of plankton, plants, algae, and bacteria that can photosynthesize, the coastal ecosystem provides a significant source of oxygen.
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5. Blueshift is observed when
1 point
O a luminous object travels alongside an observer
O a distant luminous object travels rapidly towards an observer
O a distant luminous object travels rapidly away from an observer
O a luminous object is stationary compared to an observer
Pls help I will give 21 points if it is correct
Answer:
(b) a distant luminous object travels rapidly towards an observer.
Explanation:
Blueshift is observed when a distant luminous object travels rapidly towards an observer. The correct option is B.
What is blueshift?The displacement of an approaching celestial body's spectrum toward shorter wavelengths is known as blueshift.
When an object moves away from us, the light it emits is known as redshift; when an object moves towards us, the light it emits is known as blueshift.
The blue and red shift of stars cannot be seen with the bare eye. There are several reasons for this.
First, even for an object moving at thousands of kilometers per hour, the effect is minor, with only a slight change in hue.
Red light, with both the longest wavelength, is at one end of the spectrum.
The shortest wavelength is blue or violet light. White light is a blend of all the colors in the color spectrum. It has every color of the rainbow.
Thus, the correct option is B.
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state three items that are absorbed by the plant system ?
where do materials pass in the cell
outline three process absorption help to improve
give a real life scenario of how diffusion occur
what type of molecules do we deal with in osmosis
Why did Ibrahim conclude that the dorsal spines were not used to support a hump or to regulate body
temperature?
Chemical composition of dorsal spines provides information about its function as regulation of body temperature.
The dorsal spines were not used to support a hump or to regulate body temperature because of the chemical composition of the spines. Ibrahim found that the spines were made up of bones having few blood vessels and were likely wrapped tightly in skin which can't perform the function of thermoregulation in the body.
In order to regulate temperature of the body, more blood vessels are needed and we know that in dorsal spines the structure is bony and less number of blood vessels so we can conclude that chemical composition of dorsal spines provides information about its function as regulation of body temperature.
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In order for a light bulb to be turned on in a circuit, it must have what kind of switch?
Answer:
It must have a closed switch.
Explanation:
The current cannot flow through the full circuit if the switch is open, therfore the light won't switch on. However, if the switch is closed, the current can run through the circuit and the light bulb will switch on.
How does a plant obtain the water it needs for photosynthesis?
Drag the tiles to the correct boxes to form correct pairs. Not all tiles will be used.
Match each example given to the type of scientific concept.
For every action or force
in nature, there is an equal
and opposite reaction.
arrowBoth
The outer layer of the Earth is
divided into plates that move
due to convection currents
under the surface.
arrowBoth
If the amount of daylight
increases plant growth, then
plants will have higher rates
of growth during the summer.
theory
law
observation
hypothesis
Answer:
For every action or force in nature, there is an equal and opposite reaction. ⇒ lawThe outer layer of the Earth is divided into plates that move due to convection currents under the surface. ⇒ theoryIf the amount of daylight increases plant growth, then plants will have higher rates of growth during the summer .⇒ hypothesisExplanation:
Please someone help me asap. <3
Read the statements. The molecule that gives skin its color is a molecule called melanin. In some people, skin contains no melanin These people have white skin and are called albinos, Which statement explains why some people cannot form the protein that produces melanin?
○Their genes for the production of that protein do not function
○They do not get enough nutrients to build the protein
○ Their cells do not get enough energy to build the protein
○The molecules they produce we used by organs other than the skin
Answer:
(b) is your answer of question.
match the pairs-rhizobium-
a)nitrogen fixation
b) bakery products
c) food poisoning
Answer:
A
Explanation:
1. A rapidly increasing human population is the primary driver behind what
LEADING cause of the loss of biodiversity? (SEV5.a) *
O a. Extinction
O b. Habitat Loss
O c. Pollution
O d. Overexploitation
Answer:
your answer is B. Habitat Loss
Explanation:
What is the #1 cause for the loss of biodiversity?
Habitat destruction
Habitat destruction is a major cause of biodiversity loss. Habitat loss is caused by deforestation, overpopulation, pollution, and global warming. Species that are physically large and those living in forests or oceans are more affected by habitat reduction.
Habitat loss and overexploitation, driven by our rapid population growth and unsustainable consumption patterns, are the primary causes of biodiversity loss which is now happening up to ten thousand times faster than for millions of years before.
bacterial transformations involve the transfer of what?
Answer:
DNA
Explanation:
Bacterial Transformation was discovered as a natural phenomenon 1928 by Griffith et al. Later in 1944 scientists actually identified the transforming principle as DNA. It is a process of horizontal gene transfer in bacteria. It involves transfer of DNA fragment to a live bacteria through intact cell boundary.
Answer:
DNA
Explanation:
transfer of DNA fragment to a live bacteria through intact cell boundary.
An arrangement of all the chromosomes of a diploid cell is called a(n)
Answer:
An arrangement of all the chromosomes of a diploid cell is called a kayrotype
An arrangement of all the chromosomes of a diploid cell is called a karyotype is the overall look of all the chromosomes in a species or an individual organism's cells.
What is the karyotype?A karyotype is a eukaryotic cell's nucleus' number and arrangement of chromosomes. The phrase is also used to refer to a species or an individual organism's entire set of chromosomes.
Each diploid cell in humans contains 46 chromosomes. There are 22 pairs of autosomal, or non-sex, chromosomes and two chromosomes that determine sex among them. A diploid cell has 2n total chromosomes, which is twice as many as a haploid cell's total chromosomes (n).
Therefore, a karyotype is the overall look of all the chromosomes in a species or an individual organism's cells, primarily their sizes, numbers, and shapes.
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Essay Item Chapter 13: Homeostasis and Human Urinary System (I)
During the match, the heartbeat rate of the football fans and players increases. Explain the relationship between the heartbeat rate and the activities of the football fans and the players. (10 marks]
Answer:
Adrenaline
Explanation:
The adrenaline glands, located on top of both kidneys, are glands that produce hormones to regulate blood pressure, bodily functions, metabolisms, etc. Adrenaline is released whenever the blood is redirected towards the muscles, causing surges of energy. In general, adrenaline increases blood flow in your body, which causes the heartbeat to increase, or give the feeling of a racing heart. Between the football players and the heartbeat rate, they are getting rushes of adrenaline from either participating in the game or cheering on their team from the sidelines. Hope that made sense.
Photosynthesis takes place in the which give plants their green color
Answer:
chloroplasts
Explanation:
this is fourth grade level stuff.
Answer:chloroplasts
Explanation:chloroplasts
An amoeba that lives in salt water does not have a contractile vacuole to do so.
Explain observations.
Answer:
what do we call a mutation that involves one or just a few nucleotides
How is carbon dioxide cycled between a tree and a fox what processes are involved
Answer:
The fox exhales carbon dioxide and the tree takes in the carbon dioxide and converts it into oxygen.
Explanation:
The importance of PATTERNS (base order) over the two steps of protein synthesis:
TRANSCRIPTION: The sequence ( specific order) of bases in _________determines the sequence (specific order) in the _______.
TRANSLATION: The sequence (specific order) of the bases in the ________ determines the sequence of the _________that make-up the _________.
Answer:
fdfdfdfdfdfdfdfdfdfdffd
An example of a communicable disease is
A - cancer.
B - chronic respiratory disease.
C- diabetes.
D -giardiasis.
Answer:
D giardiasis is the correct answer :)
An example of a communicable disease is giardiasis, which is in option D. Giardiasis is an example of a communicable disease. It is caused by a microscopic parasite called Giardia lamblia.
This disease affects the digestive system, causing symptoms such as diarrhea, abdominal cramps, bloating, and nausea. It is typically transmitted through the ingestion of contaminated food or water that has been contaminated with the parasite. Chronic respiratory disease includes conditions such as asthma, chronic obstructive pulmonary disease (COPD), and bronchitis, which are usually caused by long-term exposure to irritants or genetics and are not directly communicable.
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just answer the questions and pull sentences 4-5
:(
Answer:
top carnivore is alligator sorry o dont really know much about the others hope this helps a little bit
can someone please draw a flow chart of the Big Bang theory (not show) the scientific one (:
Answer:
Ur welcome ;) (Even tho I uploaded it from the web lol)
Explanation:
which trophic level is most vulnerable to extinction?
Answer:
predators since they depend on other animals
Explanation:
Maple seeds spread so that new maple trees can grow.
Which way will these seeds most likely spread?
Answer:
Maple seeds travel on the wind by using their wings. The uneaten seeds will germinate some distance from the parent plant.
Hope it helps.
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Maple seeds are considered to be wind-pollinated.
These are very light seeds so they can easily transport by wind.What is the feature of seeds to disperse through winds?Lightweight.Silky hair.Wings. Seeds of plants like cotton, poppy and drumstick are dispersed by wind. Wind dispersed seeds have special adaptations which make their dispersal easier. They are light in weight. Some have wings that help them fly long distances.What are the methods through which dispersal of seeds take place?There are five main modes of seed dispersal:
Gravity, Wind, Ballistic,Water, Animals.To know more about seeds dispersal here
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Please fill in!!
a. ATP
b. Light energy
C. C02
d. 02
e. Carbohydrate
f. Water
Would greatly appreciate if you answered like this:
18: ATP
19: etc..
18. b
19. c
20. f
21. e
22. d
23. c
24. f
25. a