Answer:
The tarnish is actually the result of a chemical reaction between the silver and sulfur-containing substances in the air. The silver is actually combining with sulfur and forming silver sulfide. Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. That’s what we call ‘tarnish.’
PLZ HELP?!!
A mountain climber starts at the base of a mountain, climbs all the way to the peak, and then climbs back down to the base. At which point is the climber's potential energy the lowest?
A. At the peak
B. At the end of the climb
C. Halfway down from the peak
D. Halfway up to the peak
EXPLAIN PLZ
The point at which the climber's potential energy the lowest is at the end of the climb. Option B
What is the potential energy?The potential energy is the energy that is possessed by a body as a result of the fact or the position of the body. Thus, the position of a body is an important factor in the determination of the potential energy of the body.
Considering the trajectory of the climber, we can see that the lowest energy of the climber is attained when the climber is at the base. Thus, the point at which the climber's potential energy the lowest is at the end of the climb.
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ANALYZE According to the Logistic Growth graph, in
what year did the limited availability of resources cause
the population to begin to stabilize?
O a year 1
Ob.year 3
O c.year 5
O d. year 7
Answer:
year 7
Explanation:
Based on what you know about enzymes, explain how the student may have measured the polyphenol oxidase activity.
Answer:
Enzymes create chemical reactions in the body. They actually speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform very important tasks. These include building muscle, destroying toxins, and breaking down food particles during digestion.
Explanation:
compare different
types of sex
chromosome?
All of the following are physical characteristics used to determine race except
a. skin color
C hair texture.
b. eye color
d. body structure.
The physical attributes that are used to determine race may not include body structure.
Body structures are generally influenced by the environment that a person lives or what they do irrespective of whether it is genetic or otherwise.
Skin color, hair texture, and eye color, however, are determined by genes located on human chromosomes. Thus, these attributes give an indication of the race that a person belongs.
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If an organism's haploid number of chromosomes is 10, it's diploid number is
If an organism's haploid number of chromosomes is 10, its diploid number is 20.
What is a chromosome?
A chromosome is a thread-like structure found in the nucleus of cells that carries genetic information in the form of genes. Chromosomes are made up of DNA, which is a chemical compound that contains the instructions for the development and functioning of all living organisms.
In most organisms, chromosomes are arranged in pairs, with one chromosome of each pair inherited from each parent. The complete set of chromosomes in an organism is known as its genome. The genome of an organism contains all of the genetic information necessary for the organism to develop, grow, and function.
Chromosomes come in different sizes and shapes, and the number of chromosomes can vary among different species. For example, humans have 23 pairs of chromosomes, for a total of 46 chromosomes, while dogs have 39 pairs of chromosomes, for a total of 78 chromosomes. The number and arrangement of chromosomes can play a role in the characteristics and traits of an organism.
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How could
biologists from a variety of fields contribute to
studying this widespread disease and developing a
treatment, prevention, or cure ?
Answer:
- Epidemiologists and bioinformaticians predict the waves of the pandemic
- Geneticists discover the molecular mechanisms involved in pathogen infection and replication
- Molecular biologists and biomedical researchers develop therapeutical strategies for treating these pathologies
Explanation:
The interdisciplinary teams are groups of professionals from different fields that work in a coordinated manner toward a common objective, in this case, for the treatment of infections caused by pathogenic organisms. An interdisciplinary team formed by members from different biology research areas (i.e., geneticists, virologists, bioinformaticists, etc) are able to work collaboratively with the same purpose to get results that are otherwise impossible.
What would a hunter be more likely to bring home? A Berries B A catfish C A cricket D Bananas
Answer:
B or C. I'm not sure which. I hope this helps, anyway!
Identify the choice that best completes the statement or answers the question.
Tamar is talking about evolution with a friend. The friend says, "It's just a theory,
so I don't believe it. When they prove it and it becomes the law of evolution, then
maybe I'll change my mind."
Which of these possible replies best describes scientific principles or the work of
scientists?
Scientific theories do not become scientific laws; they are explanations for natural
phenomena based on evidence.
Scientists take each other at their word regarding experimental results, and the public
should, too.
O He should be wary of science because it is based on research and evidence, not bias and
opinion.
Science always finds the right answer; the answers that scientists and researchers
discover never change.
Answer:
The answer is: Scientific theories do not become scientific laws; they are explanations for natural phenomena based on evidence.
Explanation:
The other answers talk about how 1) Science should be bias or opinion based 2) Scientists only take each other's word and 3) Science never changes. All of these are false. Science does sometimes change, it should not be bias or opinion-based, and scientists do not always take each other's words.
Answer:
Scientific theories do not become scientific laws; they are explanations for natural phenomena based on evidence.
Explanation:
Which of the following is a characteristic of cancer cells?
A-Viral disease
B-Have a specialized job
C-Will die after replicating 5 times
D-Loss of cell cycle control
Answer:
D. Loss of cell cycle control
Explanation:
Negative regulators of the cell cycle may be less active (or even nonfunctional) in cancer cells. For instance, a protein that halts cell cycle progression in response to DNA damage may no longer sense damage or trigger a response.
Question 7 (Multiple Choice Worth 5 points)
(01.03 MC)
What is an advantage of a pneumatic nail gun compared to a regular hammer and nails?
O it is easier to carry and store.
O It uses compressed air, which helps the nails be placed more consistently and accurately.
O It uses gasoline and is meant for outdoor use.
O It uses pressurized liquid, which allows it to do more heavy-duty work
Question 8 (Multiple Choice Worth 5 points)
Which branch of earth science includes the study of the stars
Answer:astronomy
Explanation:
Because astronomy is the study of the stars
Which fungus is unicellular? chytrid yeast truffle penicillium
Answer:
Yeast:Unicellular fungus(often referred to as yeastOther examples:Saccharomyces cerevisae(Bakers yeast)Candida SpeciesExplanation:
Hope it helps
Complete the sentence using one of the following words:
metabolism, homeostasis, or reproduction,
All living things try to maintain a stable internal environment,
also known as ____, regardless of the external
conditions in which they live.
Answer:
The answer is Homeostasis
Explanation:
Why is aluminum foil not considered a mineral
Answer:
Bauxite itself is a rock, not a mineral.
Explanation:
It is used in the United States in packaging, transportation, and building. Because it is a mixture of minerals.
What structures does the plant
cell have that an animal cell does
not?
Answer:
Only plant cells contain chloroplast and a cell wall.
Chloroplasts: trap energy from the sun to produce food for the plant cell
Cell wall: provides support and protection to the cell membrane.
Hope this helps.
Answer:
Centersome, lysosomes
Explanation:
Animal cells each have a centrosome and lysosomes, whereas plant cells do not.
Hopefully this helped!
-✩sandwichchan✩
Question 1 of 10
Lipids and proteins are both types of what?
A. Elements
B. Carbohydrates
O C. Atoms
O D. Macromolecules
Answer:
D. Macromolecules
Explanation:
Lipids and proteins are both types of macromolecules. Macromolecules are molecules made up of more than one atom, and they are larger than other types.
El Niño is caused by __________. A) ocean currents B) the isolation of continents C) orography D) all of the above
Answer:
A) ocean currents is correct
Explanation:
El Niño is caused by ocean currents. So, the correct option is (A).
What are Ocean currents?An ocean current is a type of continuous, directed movement of ocean water that is generated by a number of forces acting on the water including wind, the Coriolis effect, breaking waves, cabling, and temperature and salinity differences.
These can be caused by density differences in air, water masses that occur due to temperature and salinity variations, gravity, and events such as earthquakes or storms. These are continuous streams of sea water that spread through the ocean.
An El Niño condition typically occurs when surface waters in the equatorial Pacific become warmer than average and easterly winds become weaker than normal.
Thus, El Niño is caused by ocean currents. So, the correct option is (A).
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Match the scientist with their scientific idea.
A-Gases are formed from tiny particles so small you can’t see them. The particles are spread out into a certain area and move when people walk through them.
B-Substances combine or break apart to create new, different substances.
C-Matter was made of different kind of things.
1. Democritus
2. Bernoulli
3. Priestley
answer example:
A1-B2-C3
Answer:
a1
Explanation:
calculate the weight of an object whose mass is 30 kg and acceleration due to gravity 10 m/s2
Answer:
300 N
Explanation:
[tex] m = 30 \: kg \\ g = 10 \: m {s}^{ - 2} \\ w =? \\ \because \: w = mg \\ \therefore \: w = 30 \times 10 \\ \therefore \: w =300 \:N \:(Newton) [/tex]
The weight of the object having a mass of 30 Kg is 300 N
The weight and mass of an object are related according to the following equation:
W = mgWhere:W is the weight
m is the mass
g is the acceleration due to gravity.
With the above formula, we can obtain the weight of the object as follow:Mass (m) = 30 Kg
Acceleration due to gravity (g) = 10 m/s²
Weight (W) =?W = mg
W = 30 × 10
W = 300 NTherefore, the weight of the object is 300 N
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which of the following eat producer organisms in a food chain?
Answer:
Herbivore
Explanation:
I will give brainliest!!! Which organelle, if punctured, would leak digestive enzymes into the cell's cytoplasm? Choose 1 answer: (Choice A) A Nucleus (Choice B) B Lysosome (Choice C) C Mitochondria (Choice D) D Chloroplast
Answer:
B. Lysosome
Explanation:
It contains digestive enzymes.
Answer:
The answer is a
A kayaker moves 22 meters northward then 18 meters southward and finally 24 meters northward?
Answer:
28 meters northward
Explanation:
22 - 18 + 24 was the easiest equation, so I went with that:
22 - 18 = 4, 4 + 24 = 28
The kayaker landed 28 meters northward.
Hope this helped.
In an ideal situation in which no heat energy is produced, what is the relationship between the chemical energy provided by the battery and the electrical energy produced according to the law of conservation of energy?
Group of answer choices
A) None of these
B) The chemical energy should be equal to the electrical energy.
C) The chemical energy should be more than the electrical energy
D) The chemical energy should be less than the electrical energy.
Answer:
The answer is "B".
Explanation:
None needed i guess
Carrie is conducting an experiment on a solution. The solution's initial pH is 3.2. Then, as Carrie gradually adds Compound X into the solution, the pH increases to 9.8. Which is the most likely identity of Compound X?
Answer:
B. a strong base, such as sodium hydroxide (NaOH)
Explanation:
Protons have a positive charge, electrons have a negative charge, and neutrons have no change. Given this information, if an atom is comprised of 5 protons, 4 electrons, and 5 neutrons, what is the charge (if any) on this molecule?
how many atoms form that molecule?
Which of the following macromolecules is matched with its correct role in the cell?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
Lipid — storage of short-term energy
(Choice B)
B
Lipid — chemical messenger
(Choice C)
C
Carbohydrate — key component of cell membrane (lipid bilayer)
(Choice D)
D
Nucleic acid — chemical messenger
Answer:
(choice b) Lipid — chemical messenger
Nitrogen containing fertilizer are used by farmers to promote crop and plant growth. These fertilizers can runoff into various nearby water bodies. In a process called eutrophication, nitrogen dissolves in a body of water and stimulates the growth of plants and algae. When these plants and algae die, bacterial populations feeding on the dead material increase and consume a lot of oxygen in the water. Which of the following is likely to occur as a result of using nitrogen containing fertilizer?
Answer:
This process will harm marine life due to scarcity and reduction of oxygen levels. This will significantly harm the marine ecosystem as well.
Due to a lack of oxygen and other factors, this procedure will destroy marine life. The marine ecology will also suffer considerably as a result of this.
What is the importance of nitrogen in the environment?Farmers employ fertilizers that contain nitrogen to encourage the growth of their crops and plants. These fertilizers may leak into a number of surrounding bodies of water.
Nitrogen dissolves in a body of water through a process known as eutrophication, which promotes the growth of plants and algae.
Fertilizers give plants the nutrients' potassium, phosphorus, and nitrogen, so they can grow larger, more quickly, and generate more food.
Therefore, nitrogen in particular is a vital ingredient for the growth of every living on Earth.
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Why are Mercury ,Venus ,Earth and Mars called the ¨terrestrial ¨ planets?
enzymes are examples of which type of macromolecule? a) carbohydrates b)proteins c)nucleic acids d)lipids
Answer:
protein
Explanation:
cellular reactions
Answer:
protien
Explanation:
