Answer:
Given :
Momentum of disc = 42 kg m/s
Velocity of disc = 21 m/s
To Find :
Mass of the disc.
Solution :
❖ Momentum is defined as the product of mass and it's velocity..
Mathematically, p = m × v
p denotes momentum
m denotes mass
v denoted velocity
➛ It is a vector quantity having both magnitude as well as direction.
➛ It can be positive, negative or zero.
➛ SI unit : kg m/s or N s
By substituting the given values;
➙ p = m × v
➙ 42 = m × 21
➙ m = 42/21
➙ m = 2 kg
∴ Mass of the object is 2 kg.
Knowledge BoosteR :
As per newton's second law of motion, force is measured as the rate of change of linear momentum.
Formula : F = dp / dt
The increase of burning of fossil fuel can cauall of the following EXECPT....
Ozone layer depletion
Air pollution
Acid rain
Loss of biodiversity
Answer:
Acid rain as burning is fossil fuel doesn't lead to acid rain.
A community is concerned that its river has become polluted. Analysis of
water samples shows small amounts of over 20 different chemicals.
Which of the following is the most likely cause for the increase in
pollution?
A
The increase is due to agricultural point source pollution.
B
The increase is due to industrial point source pollution.
C
The increase is due to residential non-point source pollution.
D
It is impossible to determine.
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Answer:
B. The increase is due to industrial point source pollution.
Explanation:
Pollution is the release of harmful substances into land, air or water. The harmful or toxic substances are called POLLUTANTS. According to this question, a community discovers via analysis that its river is now polluted with small amounts of over 20 different chemicals.
This chemicals is a pollutant that can likely emanate from industrial companies and industries that produces these harmful chemicals as waste. Hence, the increase is due to industrial point source pollution.
During meiosis, homologous chromosomes line up next to each other. In some
cases, one arm of a chromatid crosses over the arm of another chromatid. What is
the result of this process?
the independent assortment of genetic material
the creation of an additional sex cell
continuity in the offspring cell's DNA
additional variation in the DNA of each sex cell formed
Crossing over is a mechanisms involved in introducing genetic variation. When the arm of a chromatid crosses over the arm of another chromatid, it results in additional variation in the DNA of each sex cell formed. Option D.
---------------------------------------
Crossing-over between homologous chromosomes (prophase 1), the random lining of homologous chromosomes (metaphase 1), and random fertilization are the mechanisms involved in genetic variation.
The Crossing-over events occur between two homologous chromosomes in the equatorial plane and make the daughter cells genetically different from the original one.
The Chiasma is the position where two homologous chromatids interchange genetic information, giving a place for new genetic material or information to be provided to descendants.
After crossing over, homologous chromosomes get separated again.
So, according to this information, when the arm of a chromatid crosses over the arm of another chromatid, it results in additional variation in the DNA of each sex cell formed.
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Related link: https://brainly.com/question/18824252?referrer=searchResults
https://brainly.com/question/12911831?referrer=searchResults
The structure of proteins is related to their function. true or false
Answer:
A protein's shape determines its function. Proteins are composed of amino acid subunits that form polypeptide chains.
it's true
Will give brainliest!
How does the melting of ice caps near the North Pole affect the salinity of the ocean?
Salinity decreases because freshwater flows into the ocean.
Salinity increases because of the stored pockets of air and salt.
Salinity increases because salt from the ice caps flows into the ocean.
There is no change in the ocean’s salinity with this process.
Answer:
B Salinity increase because salt from the ice caps flows into the ocean
Explanation:
took the test
The flocks all started with 10 birds. Flock
was the most successful at feeding, so it will have the greatest number in the second generation. Flock
was the least successful at feeding and has shrunk the most.
In this scenario, natural selection is affecting many populations of birds with different beak morphologies, which affects how well they can eat the available foods. Each flock initially consisted of 10 birds, but over many generations, natural selection favored some traits over others, changing the population size.
One flock, referred to as "Flock," had the greatest number of second-generation birds because it was the most successful at feeding. Another flock, known as "Flock," had the worst feeding results and has had the greatest shrinkage.
Learn more about Natural selection, here:
https://brainly.com/question/2725702
#SPJ1
Your question is incomplete, most probably the complete question is:
The flocks all started with 10 birds. Flock was the most successful at feeding, so it will have the greatest number in the second generation. Flock was the least successful at feeding and has shrunk the most. With three foods available, natural selection has favored Flock , which has increased the most in the first three generations. Meanwhile, Flock has declined the most because its beak was the least successful phenotype for the food available.
Which of these answer choices best describes the overall effects that would occur in an animal that consumes this plant?
Answer:
The majority of ATP will not form.
Explanation:
The poison leaf plant, also known as gifblaar contains fluoroacetic acid, a compound that shut down the Krebs cycle that leads to less production of ATP because Krebs cycle drives the formation of electron carriers. These electron carriers are very important because these electron carriers carry the energy that is used to create a large number of ATP molecules in the final steps of aerobic respiration so we can conclude that majority of ATP will not form due to poison.
1. Give an example of a behavior you observed in another person. When you looked at
their behavior, did you decide their action was more a result of circumstances, or their
personality? What information did you use to make your judgment? (6 points)
(its psychology btw)
Answer and Explanation:
The person to whom I observed a behavior that will be exposed in this response was a character from a show called "Reply 1988." This character showed a highly explosive behavior and was very nervous and stressed. I believe that this behavior is a result of the circumstances that this character was experiencing at the time, as he was under a state of great tension and stress, as he believed that his son had suffered a plane crash. In addition, this character has always shown a very calm and peaceful personality throughout his life, which shows that the explosive behavior was caused by the circumstances. To make this judgment I used the way the character behaves in his daily life and his interactions with other characters.
Which best explains how Washington’s government manages the negative effects of water issues?
A. It builds fish ladders to help restore migration.
B. It removes fish ladders to help restore migration.
C. It requires homeowners to fix water leaks in their homes.
D. It allows more water to flow through dams to ensure supply.
it is NOT B. "It removes fish ladders to help restore migration" edge 2021
Answer:
D
Explanation:
Answer: A. It builds fish ladders to help restore migration.
Explanation:
1. One reason for controlling which genes are expressed in multicellular organisms is that
a. different cells have different functions so they need different proteins.
b. we need all proteins made in every type of cell.
c. we need cells made all the time.
d. not every cell needs amino acids.
e. none of the above
26. Which equation is NOT balanced?
a. 4H, +202 + 4H2O
b. H2 + H2 + O2 -> H2O + H2O
c. 2H2 + O2 -> 2H2O
d. 2H2 + O2 + H2O
Answer:d. 2H2 + O2 -> H2O
Explanation:
1. Within food chains, matter is
a) constantly increasing
b) constandy decreasing
c) always changing from one element to another
d) alavays recycled from one chemical form into
another
Answer:
C
Explanation:
When an organism eats anothee organism matter transfers
Autotrophs can be classified into two groups according to which of these properties?
Answer:
(a) energy source, either sunlight or chemicals
Explanation:
An area of grassland is transitioning into a desert due to overgrazing of livestock. What will happen to the population of grass eating
native organisms in the area?
O A. The population will increase.
OB. The population will decrease.
C. The population will experience no change.
D. The population will decrease, then slowly increase.
Answer:A
Explanation:
Because n
Answer:the answer is B.the population will decrease.
Explanation:
The population will decrease because since the grassland is turning into a desert due to overgrazing, it will be causing the grass to die out, and since the grass is dying out, the grass eating native organisms population will start to go down as well because there will be no more grass to eat from, so therefore i think the answer is B. The population will decrease.
I hope this helps :3
In which domain would you place the kingdom archaebacteria?
Answer:
Explanation:
The kingdom you would put archaebacteria is the kingdom called archaebacteria
What is the relationship between photosynthesis and respiration with respect to energy
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is food for the plant. Cellular respiration converts oxygen and glucose into water and carbon dioxide. ATP is the energy that is made in the process.
Explanation:
Which statement best summarizes the relationship between time and distance in echolocation and sonar?
A. The closer the detected object, the slower the returning sound waves travel through a medium.
B. The farther away the detected object, the faster the returning sound waves travel through a medium.
C. The closer the detected object, the longer it takes the sound waves to return.
D. The farther away the detected object, the longer it takes the sound waves to return.
Answer:B
Explanation:
What are the relationships between an organism and its environment?
Sorry cant help and dont hit the link its a virus
What provides energy to muscles and helps keep
them strong?
Answer:
The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body's biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells. So once muscle contraction starts, the making of more ATP must start quickly.
Answer:
adenosine triphosphate (ATP)
Explanation:
Creatine phosphate can supply the energy needs of a working muscle at a very high rate, but only for about 8–10 seconds.
Which of the following forms does chromatin condense to when a cell is preparing to divide?
A. Chromosome
B. Ribosome
C. Centrioles
D. Histone
2. Plankton are major producers in marine ecosystems. Only a small proportion of the energy
harvested by plankton is passed to the primary consumers. Which process in phytoplankton results
in the largest loss of energy that could otherwise be utilized by consumers?
A Movement
B. Homeostasis
C. Excretion
D. Respiration
Answer:
I think it is letter C
Explanation:
Correct me if I am wrong
The correct answer is option D. respiration as producers and other organisms of each trophic level most of their energy lose by metabolic reactions such as cellular respiration.
Energy decreases as it moves up trophic levels because energy is lost as metabolic heat as energy flow from one organism to another trophic level are consumed by organisms from the next level.
only 10% of energy transfers to the next trophic level.Regulation of homeostasis of the organisms is also one of the ways an organism loses their energyExcretion or feces is also one of the ways organism lose their energyMost of their energy lose by metabolic reactions such as cellular respiration.
Learn more about energy flow:
https://brainly.com/question/20839694
Select the correct answer from each drop-down menu.
In a forest, gazelles were the main source of food for cheetahs. The gazelles depended on grasses and shrubs for their food. A mysterious disease quickly spread among the cheetahs, killing many of them. What impact would the decline of the cheetah population have on resource availability?
Because the number of cheetahs declined, the population of gazelles will most likely . This situation, in turn, will lead to increased between the gazelles and other herbivorous animals that eat the same food as gazelles.
Answer:
due to natural selection , if the predator of the gazelle declines, then the prey the gazelles will increase since there isn't many cheetahs killing them anymore.
the second should be competition, since there will be more gazelles needing to eat.
Explanation:
a deletion mutation occurs when what happens?
A. A nucleotide is removed from the DNA strand
B. An entire strand of DNA is added
Answer:
A) A nucleotide is removed from the DNA strand.
Explanation:
When you remove something, you are deleting it.
2. Suppose you mate a black rooster with a
white hen. The feathers of all the offspring
are black. Explain the inheritance pattern in
these chickens. Draw all possible Punnett
Squares.
Answer:
Black feathers in an autosomal dominant trait
White feathers in an autosomal recessive trait
Punnet squares are in the image
WILL GIVE BRAINLISTTT!!! After learning about the conditions under which extremophiles live, do you think it is reasonable to argue that life could probably exist on other planets? Explain.
Answer:
Yes, as extremophiles are able to live in extreme conditions, like the extreme conditions that many other planets have.
Which of the following best describes Growing Degree Day total?
A. a measure of the amount of heat needed to encourage plant growth
B. a measure of the amount of heat a plant is exposed to over a single day
C. a measure of the amount of heat a plant must experience before reaching maturity
D. a measure of the amount of heat tolerance a plant demonstrates
Answer:
C.a measure of the amount of heat a plant must experience before reaching maturity
The picture is Groove in a cliff
We breathe in_____
spores all the time. The air is loaded with them.
Answer:
water spores
Explanation:
cheese
Answer:
Microorganisms
Explanation:
Which of these best demonstrates mutualism between certain types of bacteria and humans?
1.Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
2.Bacteria become resistant to antibacterial medication that humans use for treatment.
3,Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.
4.Bacteria in improperly prepared food is consumed by humans, causing food poisoning.
Answer:
1 is your answer
Explanation:
Mutualism is where one organism helps another organism where both benefit and none are harmed
13. What animals belong in this class of crustaceans? Branchiopoda
Answer:
Hippopotamus
Explanation:
Hope it help ya