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
Which process occurs directly after meiosis II?
DNA replication
reproduction
cell differentiation
mitosis
1
Answer:
It's cell differitiation
Explanation: I took the test and got it right trust me.
Which type of ATP production requires oxygen?
Answer:
Cellular respiration
Answer:
Cellular respiration
Explanation:
because it needs it to release energy from food for use by cells.
6. Identify the type of climate data that has the longest data range. 1. microscopic organism 2. data sediment core 3. data tree ring 4. data ice core data
Complementing data, taken from different sources such as tree rings, sediments, and ice, provides significant information about global climatic changes. However, ice core data has the longest data range. (4) is correct.
-------------------------------
Ice core data refers to the information obtained from a sample of ice taken from a glacier or a mountain.
Information kept in the ice is mostly about gases concentration at different moments though time.
Analysis of retained gases in Antarctic ice, through perforations of over 2000 meters deep, has allowed knowing the CO₂ atmospheric concentrations and other gases involved in the greenhouse effect for at least 150,000 years.
These concentrations have varied in the temporal scale of glaciation, showing low concentrations during glacial periods with low temperature and relatively high concentrations during interglacial periods with high temperature.
Between these two periods, abrupt variations in temperature and gas concentration are detected, meaning that changes in CO₂ cause changes in temperature.
The increase in CO₂ is a highly significant component in global climatic change and possibly the best documented.
This information is the best paleoclimatic documents.
Complementing it with marine sediments core and data tree rings makes it possible to know about the principal traits of terrestrial weather in the lasts 420,000 years, practically four glacial-interglacial cycles.
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what are some reasons implicit stereotypes might differ from explicit stereotypes?
Answer:
Implicit stereotypes are automatically activated and operate indirectly, and thus individuals may not be aware that they possess such beliefs. In contrast, explicit stereotypes are accessible to conscious awareness and are what individuals report when asked about group differences.
Explanation:
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Implicit stereotypes operate automatically and indirectly, so people may not realize they have them. When asked about group differences, people report explicit stereotypes.
What are stereotypes?A stereotype is a preconceived notion or combination of traits that many people hold to be indicative of a certain kind of person or object. Stereotypes are traits that society automatically ascribes to particular groups of people in order to categorize them according to factors like age, weight, occupation, skin tone, gender, etc.
Since implicit stereotypes function subtly and automatically, people may not even be aware that they hold such beliefs. Conversely, explicit stereotypes are cognizable and are what people report when questioned about group differences.
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What happens to air as it is moved into the body?
*it's D
Answer:
all of the above
Explanation:
Answer:When you inhale (breathe in), air enters your lungs and oxygen from the air moves from your lungs to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathe out). This process is called gas exchange and is essential to life.
Explanation:
brainliest pls
what will happen to a population of organisms that are in an environment with little to no oxygen?
Answer:
Hypoxia occurs when algae and other organisms die from lack of oxygen and available nutrients. Hypoxia events often follow algal blooms. The cyanobacteria, algae, and phytoplankton sink to the seafloor, and are decomposed by bacteria. This lack of oxygen creates dead zones in which most aquatic species cannot survive.
Explanation:
Hope this helps maybe...
Complete the blanks in the following paragraph using the appropriate words from the list:
anterior, bilateral, inferior, lateral, medial, posterior, superior
Dominic's friends thought they were really funny when they dropped a water balloon on his head! The water drenched the (1) ___ portion of his head and then ran down the (2) ___ portion of his body, getting the front of his shirt all wet. He and his younger brother decided to get back at his friends by sneaking up on them with their water guns. They tiptoed up behind C.J., soaking his back and the entire (3)___ of his body. Next, they snuck up on Tony. Dominic sprayed down the middle, (4)___ part of Tony's body while his brother sprayed the arms and other (5) ___ portions. Good thing it was a hot day because everyone was soaked by the end of the game!
Answer:
1 Superior
2 Anterior
3 Posterior
4 Medial
5 Bilateral
Why are viruses like the avian flu important for vet scientists to study?
Answer:
to help detect other livestock diseases early could help to prevent the staggering economic losses
(short answer but hope this helps) :)
what would happen to you metabolically if all your mitochondria were destroyed
Answer:
You would die
Explanation:
if you lost your mitochondria you would die
The loss of functional mitochondria would result in a severe energy crisis within the cell, affecting ATP production and impairing Fatty acid metabolism and calcium homeostasis.
Mitochondria are known as the "powerhouses" of the cell because they are responsible for producing most of the cell's adenosine triphosphate (ATP).
The following processes would be affected:
1. ATP production: Without functional mitochondria, ATP production would be significantly reduced, leading to a severe energy deficit within the cell.
2. Oxidative phosphorylation: Mitochondria are crucial for oxidative phosphorylation, a process that occurs in the inner mitochondrial membrane and generates a large amount of ATP. Without intact mitochondria, oxidative phosphorylation would be disrupted, impairing ATP synthesis.
3. Metabolism of fatty acids: Mitochondria are involved in the breakdown of fatty acids through a process called beta-oxidation. If mitochondria were destroyed, the ability to efficiently metabolize fatty acids would be compromised.
4. Reactive oxygen species (ROS) regulation: If mitochondria were destroyed, the regulation of ROS levels would be impaired, potentially leading to oxidative damage and disruption of cellular processes.
5. Calcium homeostasis: Mitochondria are involved in maintaining calcium homeostasis within cells. Loss of functional mitochondria would disrupt calcium regulation, which could affect various cellular functions, including muscle contraction, enzyme activity, and cell signaling.
Therefore, the loss of functional mitochondria would result in a severe energy crisis within the cell, affecting ATP production and impairing various metabolic processes.
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which molecules determine the tissue specificity of hormones?
Answer:
Steroids. Which molecules determine the tissue specificity of hormones? Receptors. Hormones bind to receptors on target cells and trigger a cellular response.
Explanation:
The tissue specificity of hormones is determined by hormone receptors. Proteins called hormone receptors are found on the cell surface. A hormone's binding to its receptor starts a chain of actions that eventually affects the activity of the cell.
For various hormones, different cells have various receptors. This implies that a hormone can only attach to cells that also contain such receptors. The tissue specificity of hormones is a result of this.
For instance, the insulin hormone attaches to receptors on cells in the muscle, fat, and liver tissues. These receptors bind to insulin, which sets off a series of processes that eventually result in the absorption of glucose from the circulation by these cells.
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which statement about food production since 1960 is true?
Answer:
During this time our food production has grown even faster than our population
Explanation:
hope this helps you if it does please mark brainiest
muscle cells are said to have what characteristic because they can respond to stimulation from the nervous system?
Answer:
Muscle cells are excitable; they respond to a stimulus. They are contractile, meaning they can shorten and generate a pulling force. When attached between two movable objects, in other words, bones, contractions of the muscles cause the bones to move.
Explanation:
Hope this helps.
Can someone explain this I don’t get it. Please asap test tmr
Organos involuntarios de la respiración
-traqueal
-cutanea
-branqueal
Answer:
BRANQUEAL THANKS ME LATE
How is an angular unconformity different then a disconformity?
Answer:
Angular unconformity represents the folding of an old sedimentary sequence, planing of the tilted strata by erosion, and the deposition of a young sedimentary sequence on the old truncated strata. ... Disconformity refers to an unconformity in which the beds above and below the surface are parallel.
what does it mean when the lining of the uterus is thick?
Answer:
When the endometrium, the lining of the uterus, becomes too thick, it is called endometrial hyperplasia. This condition is not cancer, but in some cases, it can lead to cancer of the uterus.
Explanation:
Why is it important to form a hypothesis at the beginning of an experiment?
What is a scientific theory?
What is a scientific law?
Answer:
cvcccca
Explanation:
ajh
Stars are composed primarily of which elements?
Answer:
hydrogen and helium
Explanation:
Which is not some other occurs in translation?
Explanation: Translation has pretty much the same three parts, but they have fancier names: initiation, elongation, and termination. Initiation ("beginning"): in this stage, the ribosome gets together with the mRNA and the first tRNA so translation can begin.
I guess this helped you
what do you think would happen to a population of bacteria in a petri dish over time in ideal condition?
Answer:
the bacteria would continue to grow untill the agar is completly corroded as the bacteria eats away at it, after the agar is consumed the bacteria would die away as it doesnt have the sufficient nutrients to live
Explanation:
chicken must be cooked to an internal temperature of 165°f. why must chicken be cooked to this temperature?
Answer: Cooking chicken to at least 165°F makes the chicken safe to eat.
Explanation: This kills all of the bacteria in the meat, leaving it safe to eat.
If you don't fully cook the chicken to at least 165°F, you may eat harmful bacteria which can cause unpleasant illnesses such as Salmonella.
It is advised to follow safe food handling practices.
most bryophytes, such as mosses, differ from all other plants in that they _____.
Answer:
That they lack true leaves and roots I hope this helps you! :D
which structures are common to both plant and animal cells?
Answer:
What are:
Nucleus
Cell Membrane
Cytoplasm
Mitochondria
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Miss Hawaii
how long does it take for a body to start decomposing
Answer:
24-72 hours after death
Explanation:
Hope this helps!
Question 4 of 25
How are photosynthesis and cellular respiration related?
A. Cellular respiration is the process animals use to produce glucose, while photosynthesis is the process plants use to produce glucose
B. The products of photosynthesis are the reactants of cellular respiration
C. Photosynthesis produces water molecules, while cellular respiration splits water molecules apart.
D. Cellular respiration provides the energy for photosynthesis.
Answer:
B. The products of photosynthesis are the reactants of cellular respiration.
Answer: I think its B.
If two solutions are isotonic to each other then?
features of a depositional coast may include spits, barrier islands, tombolos, and __________.
How might photosynthesis account for seasonal changes in carbon dioxide in the atmosphere? ( for example, why might carbon dioxide levels be highest in May but lowest in October? )
Answer:
When plants are growing, photosynthesis outweighs respiration. As a result, plants take more CO2 out of the atmosphere during the warm months when they are growing the most. Levels of carbon dioxide in the atmosphere rise and fall each year as plants, through photosynthesis and respiration, take up the gas in spring and summer, and release it in fall and winter. Now the range of that cycle is expanding as more carbon dioxide is emitted from burning fossil fuels and other human activities.
Explanation:
gogle
Calculate USDA grade for a 330lb barrow with average muscling and 1.0”
backfat:
Answer:
is there a picture
Explanation:
Describe the roles of the liver and the pancreas in the digestion of fats.
Answer:for the liver this is to produce bile and for the pancreas is to produce pancreatic juices
Explanation:bile helps in the absorption in the ileum and pancreatic juices contain amylase,lypase and peptide