Answer:
True
Explanation:
Water freezes faster than alcohol due to lower freezing point.
Water takes less time to freeze than alcohol but can absorb a large amount of heat with only a small change in its temperature. Alcohol has -114.7 degrees Celsius of freezing temperature whereas water has freezing point of 0 degrees Celsius.
The given statement is true. Water freezes faster than alcohol. Due to its lower freezing point than alcohol, water freezes more quickly.
Why water freezes faster than alcohol?Alcohol takes longer to freeze than water, but water can absorb a lot of heat with just a slight change in temperature. Water has a freezing point of zero degrees Celsius, but alcohol has a freezing point of -114.7 degrees Celsius.
Because water molecules must be forced to move more quickly within the water in order for the temperature to rise, water is more able to absorb heat than many other substances. As a result, water freezes more quickly than alcohol.
Therefore, The given statement is true. Water freezes faster than alcohol. Due to its lower freezing point than alcohol, water freezes more quickly.
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Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statement into the correct box. some statements may apply to more than one type of microscopes. Some statements may not be used.
Answer: Light microscope:
use a beam of light to produce magnified images
can be used to examine living cells and tissues
Scanning electron microscope:
use a beam of electrons to produce magnified images
can be used to examine DNA
can be used to examine cells
Transmission electron microscope:
use a beam of electrons to produce magnified images
can be used to examine DNA
can be used to examine cells
Explanation: Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.
Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:
1. Scanning electron microscope(SEM): an electron beam passes over the specimen's surface and displaces electrons which are then focused on a screen to form an image. Images appear in 3-D
2. Transmission electron microscope: electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D
57- From classes of Phylum: Annelida
A- Cestoda
B- "Trematoda
C- Myriapoda
D- Oligochnota
Answer:
D- Oligochnota.
......
brian period occurred approximately 500 million years ago, and we are currently in the Quaternary period.
PERIOD
ANIMALS
PLANTS
Humans
Flowering
plants
Mammals
Birds
Ginkos
Quatemary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Pennsylvanian
Mississippian
Devonian
Silurian
Ordovician
Cambrian
Reptiles
Pines
Amphibians
Club mosses
Horsetail rushes
Fems
Animals with shells
Fishes
Based on the chart, describe the trends that can be observed in animal and plant fossils as they evolved over time.
Use evidence from the chart to support your conclusions.
B IV x x Font Sizes
А 三星 三 三
А
Choose all options that apply. Which of the following medications are considered high-alert medications? | a) Heparin b) Insulin c) Ibuprofen d) Penicillin
Answer:
Insulin
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what type of weather is typically associated with the air pressure system near Salem
Answer:
According to common weather maps of the region surrounding Salem, Massachusets, the weather typically associated with the air pressure system is rain.
Explanation:
Given the nature of warm air and its tendency to rise, warmer regions tend to fall under the low-pressure system category. These systems, due to the movement of the warm air, have lower pressure at their center than in the areas surrounding them. As the wind blows towards the low-pressure air systems, the cooler and warmer air meet within the atmosphere, which causes the water vapor to condense and form clouds. Oftentimes, these clouds then precipitate, causing rain.
Which three structures are found in both prokaryotic and eukaryotic cells?
A. cytoplasm, endoplasmic reticulum, DNA
B. ribosomes, DNA, cytoplasm
C. nucleus, cell wall, cell membrane
D. cell membrane, endoplasmic reticulum, ribosomes
The answer is B. Prokaryotes do not have endoplasmic reticulum, cell wall, cell membrane or a nucleus. But they do have DNA (just not in a membrane bound nucleus), ribosomes, and cytoplasm.
g What is the ultimate cause of the many extinctions for the megafauna (Diprotodon, Giant Wombat, Marsupial Lion, Giant Goanna, etc) once found in Australia
Answer:
These animals are thought to have succumbed to hunting pressure related to the expansion of Australia's human population.
When an unbalanced force acts on an object, in which direction does the object
move?
The object moves in the direction of the net force.
The object moves in the direction of the smaller force.
The object moves in the opposite direction of the unbalanced force.
The object moves in the direction of the unbalanced force.
Answer:
Explanation:
The object moves in the direction of the net force. It depends on what you have been told. I would say that A is the correct answer.
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|
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A
Both the forces shown above are unbalanced. But the object will not move in the direction of either of them. The net force is somewhere between the two given forces and that's the direction of the motion.
what is iris diaphragm
Answer:
noun Optics, Photography. a composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system. Also called iris.
Explanation:
A person who has type AB blood:
Answer:
B-positive (B+): 9%
AB-positive (AB+): 4%
A-positive (A+): 30%
How the plants survive in tropical rainforest?
Answer:
The plants have adapted to the rainforest environment by growing their roots deep into the ground and extending their leaves high into the tree canopy to receive sunlight for photosynthesis. Mant plants have adapted to the immense amount or water they are exposed to in their environment.e
Which side is hypertonic ? A or B ?
Which side will gain water
What is c ?
Answer:
1-b
2-b
3-phospholipid bilayer
B side is hypertonic. It will gain water. C is Phospholipid layer.
What is Hypotonic Solution?
A hypotonic solution is a type of solution that has a lower osmotic pressure than any other solution to which it is compared. It is a solution in which a small amount of solute passes across a semipermeable membrane compared to the amount of solute in the other solution.
If the solute concentration outside the cell is lower than inside the cell, these solutes cannot cross the membrane, so the solution is hypotonic to the cell.
The cell membrane consists of a phospholipid bilayer containing embedded proteins present between these two solutions where a hypotonic solution has a relatively low concentration of solutes.
Thus, B side is hypertonic. It will gain water. C is Phospholipid layer.
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Hemolysis is:
O A) when a red blood cell is in a hypertonic solution and the cell ruptures
O B) when a red blood cell is in a hypotonic solution and the cell ruptures
O C) when a red blood cell is in a hypotonic solution and the cell shrinks
O D) when a red blood cell is in a hypertonic solution and the cell shrinks
calculate the magnification of the drawing below, If the length of the leaf is 30mm and the length of the drawing made was 100mm
Answer:
10
Explanation:
The magnification of the drawing made was 10 because it had a length of 100mm and originally had a length of 30mm. It can also be said that the magnification is 3 since dividing by the original length (30) we get: 100/30 = 3.
Help please, am I even doing this right?
Answer:
Looks good to me :)
Explanation:
What do you think would happen if the mitotic spindle did not function correctly?
Answer:
The presence of extra centrosomes leads to the formation of a multipolar mitotic spindle, which, if not corrected prior to anaphase, results in the segregation of chromosomes into more than two daughter cells.
Explanation:
Researchers identify a gene in cockroaches that is responsible for their ability of nerve regeneration. How might it be possible for this gene to be used in treating human paralysis?
This gene could be analyzed to determine its homology level with a human gene, which then could be restored in its normal expression. This strategy can restore the normal phenotype in defective human cells.
Sequence homology, which refers to the level of evolutionary relationship among genetic or proteins sequences, is a fundamental subject matter to determine gene function.
From this approach (sequence homology search), researchers can identify valuable genes involved in diseases in which the restoration of their normal expression levels can be used to restore the normal phenotype in defective cells.
In this case, the identification of a gene in cockroaches that is responsible for nerve regeneration could be used for subsequent identification of a human homologous gene sequence, which then can be restored in order to treat human paralysis.
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explain four example of cybercrime
Answer: Hacking.
XSS: Cross-Site Scripting.
Denial-of-Service Attack.
Phishing Scam.
Spamming.
Explanation:
if bird cannot migrate what it does to survive
L 3.2.2 Quiz: Matter and Energy
Question 5 of 10
Which substance is an example of organic matter?
A. Carbon dioxide
B. Oxygen
C. Salt
O
D. Sugar
Answer:
D
Explanation:
An example of organic matter is sugar
Why don't the hydrolytic enzymes Within lysosomes destroy each other?
Answer:
A lysosome is a membrane-bound cell organelle that contains digestive enzymes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria. If the cell is damaged beyond repair, lysosomes can help it to self-destruct in a process called programmed cell death, or apoptosis.
Explanation:
The small-brained Plio-Pleistocene hominins are generally referred to as the _____. The major members of this group are divided into two major groupings, the _____ and the robust forms. Many scientists prefer to separate the robust forms even further into their own genus and/or subgenus, _____.
Scientists make archaeological findings to discover how human life began as well as the forms of life that existed in the past. The blanks in the sentences above have been filled accordingly;
The small-brained Plio-Pleistocene hominins are generally referred to as the Africanus. The major members of this group are divided into two major groupings, the gracile and the robust forms. Many scientists prefer to separate the robust forms even further into their own genus and/or subgenus, Paranthropus.The Hominin are primates under which the Paranthropus and Australopithecus. These genii are early relatives of man.
These small-brained Plio-Pleistocene hominins are generally grouped into the gracile and robust forms.
The Paranthropus are the robust genus while the Australopithecus are the gracile genus.
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Matter begins to move through this food chain when the?
Answer: When the energy of the sun is captured by plants.
An man about 80 years old, lives alone. He looks very weak and undernourished. His lower limbs bones are tender and thin. Due to poor diet and loneliness, he lacks the essential vitamins and minerals for his bone formation. Explain bone formation (ossification) , and bone marrow formation which this man is lacking.
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All bone formation is a replacement process. During development, tissues are replaced by bone during the ossification process. In intramembranous ossification, bone develops directly from sheets of mesenchymal connective tissue. In endochondral ossification, bone develops by replacing hyaline cartilage, bone formation, also called ossification, process by which new bone is produced. ... Soon after the osteoid is laid down, inorganic salts are deposited in it to form the hardened material recognized as mineralized bone. The cartilage cells die out and are replaced by osteoblasts clustered in ossification centres.
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If each of these food chains start with 10,000 grams of phytoplankton, how much reaches the highest trophic level in each food chain
Energy is transferred from one trophic level in a food chain to another. However, not all the energy available at a trophic level is transferred to the next.
Only about 10% of the energy in the lower trophic level gets to the immediate higher trophic level and the rest is lost as metabolic heat.
Thus, if a food chain starts with 10,000 grams of phytoplankton, the quantity that will get to the highest trophic level would depend on the number of intermediate trophic levels in between the lowest and the highest.
For every step the energy is transferred up the trophic level in the food chain, 90% of it is lost.
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how do i write an email to apply for university
Answer:
Well personally I haven't written an email to apply for a university but i'll try to help.
Composing your Email
1. Find your admissions officer
If possible, locate the email of the admissions officer for your region. For example, if you live in Florida, you want to target the email to the admissions officer that reads for the Southeast. It is important to locate the admissions officer for your region since they will be the person reading your college application when you submit it. They should be familiar with your name and remember you positively.
2. Address the admissions officer properly
Begin your email by addressing the admissions officer in a kind, proper manner. Don’t use slang or abbreviations that you might use with your peers while texting. Your writing should highlight your maturity and ability to communicate in a professional setting.
“Good morning, Ms. Smith,”
“Hello, Mr. Johnson,”
3. Introduce yourself
Admissions officers receive hundreds of emails a day from prospective students so a concise email that simply gets to the point saves time and energy. Therefore, you shouldn’t spend a great deal of time introducing yourself. You are unlikely to increase your probability of acceptance by sending an email detailing your life’s accomplishments. Instead, write a brief sentence or two, providing your name and any relevant background information that may inform their answer.
“My name is Hayley Hall and I am applying to Pomona College in the Fall of 2020. I am particularly interested in majoring in Engineering.”
4. Be specific
Once you have provided your name and relevant information, ask specific questions. Don’t ask generic questions you should already know the answer to from your college search.
Avoid questions like:
“What’s the acceptance rate for UCLA?”
“What does Yale look for?”
“How much does each credit hour cost for in-state students?”
Colleges provide lots of general information about the school on their website. Search their website thoroughly before reaching out. If you ask for information that the college already provides, it might signal to an admissions officer that you haven’t done your due diligence looking for information on your own.
Instead, ask more detailed questions like:
“What types of companies does the College of Engineering have partnerships with?”
“When do most students start performing research?”
“What would you say students are most excited about on campus?”
These kinds of questions prove that you have done your research but want more in-depth information about their university. Your curiosity will bode well with an admission officer. It will signal you are seriously considering their university. Their answers will help you make informed decisions about the schools you are considering and potentially provide information for your “Why This College” essay!
5. Do not be afraid to ask questions about your required materials
You can also email admissions officers to confirm they have received all of your materials. For example, if you have sent in your SAT/ACT scores but haven’t received a confirmation email from the school that they received it, you can follow up with the school. The email should be detailed, concise, and professional.
Which method of timber harvesting removes all trees from the harvest area?
Hey, I need help with this question:
Answer:
(D) two different species on the basis os reproductive behaviour
BRAINLIST PLS
The trapezius is a(n) _____ to the pectoralis major.
Answer:
complement
Explanation:
The trapezius is a complement to the pectoralis major.
What is Trapezius?The trapezius may be characterized as one of the widest and most superficial muscles that are located in the upper back and trunk region. It is triangular in structure, wide, and thin that encircles the upper back of the shoulders and neck.
While the pectoralis major is the most superior and largest muscle that is located within the region of the anterior chest wall. This muscle is thick, fan-shaped in appearance positioned beneath the breast tissue, and constructs the anterior wall of the axilla.
Both of these muscle types complement each other in every aspect such as location, structure, appearance, etc.
Therefore, The trapezius is a complement to the pectoralis major.
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which describes fat?
A. a lipid that stores energy
B. a nucleic acid that directs cell function
C. a protein that speeds up a chemical reaction
D. a carbohydrate that produces energy
Answer:
The answer is A
Explanation:
a lipid that stores energy