Given,
A 42,000 kg train car travelling at 10 m/s toward a stationary train car with a mass of 40,000 kg.
What is momentum?Momentum is a product of the mass of a particle and its velocity. Momentum is a vector quantity which means it has both magnitude and direction. Its formula = mass × velocity.
Solve for momentum:
M= (42,000kg)(40,000kg) / (10m/s)
M = 42,000 kilograms - 40,000 kilograms
M = 2,000kg
M = 2,000 kg ÷ 10m/s
= 200m/s
-Thus they collison at the same speed of 200m/s.
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sea turtles enter a high-energy state called ___ after they hatch.
How do geologists study direct evidence of Earth’s interior?
by collecting drill core samples of Earth’s crust
by measuring seismic wave activity
by analyzing how living things survive
by recording changes in climate patterns
Answer: A
Explanation: E2022
Geologists study direct evidence of Earth's interior by measuring seismic wave activity, which is the second option, as the seismic waves are waves of energy that travel through the earth's interior.
What are seismic waves?Geologists use various techniques to study the Earth's interior, but one of the most important is the measurement of seismic wave activity. Seismic waves are generated by various sources, such as earthquakes, volcanic eruptions, and human-made explosions. The waves travel through the earth's interior and can be detected by seismic instruments such as seismometers. Seismic waves come in two main types: body waves and surface waves. Body waves are waves that propagate through the earth's interior, while surface waves travel along the earth's surface. Body waves are further divided into two types: P-waves and S-waves.
Hence, geologists study direct evidence of Earth's interior by measuring seismic wave activity, which is the second option.
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What are the "two sides" of the
Golgi body?
Explanation:
Cis and trans face of Golgi apparatus are two sides of Golgi apparatus. Cis face receives vesicles from ER. These vesicles fuse with Golgi apparatus and form new cisternae. Vesicles filled with processed proteins and lipids exit from the trans face of the Golgi apparatus.
What condition must be met for conduction to occur
based on the data, what can you infer about the relative pH of the stomach?
The pH of stomach is important as it helps to induce the digestive enzyme called pepsin. The presence of HCL i.e., hydrochloric acids in stomach results in the pH of stomach to become acidic which range from 1.5 to 6.5 values.
What is the pH level of stomach?When the bolus enters the stomach, it aids the release of gastric juice having enzymes, mucous and HCL.
The upper and lower parts of stomach have varying pH values. Upper part has a pH of 4−6.5, while the lower part is with a pH of 1.5−4.0 which is highly acidic due to HCL.
Thus, the relative pH of stomach is acidic ranging from value 1.5 to 6.5.
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Temperature, cloud cover, and thunder are all examples of
O a. storms
O b. weather
O c. climate
O d. barometric pressure
Temperature, cloud cover, and thunder are all the examples of weather. Thus, the correct option is B.
What are the weather conditions?Weather is the state of the atmosphere. This is the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy at a geographical location. On the Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, just below the stratosphere of the Earth.
Weather refers to the day-to-day temperature, precipitation, and other atmospheric conditions, whereas the climate is the term for the averaging of atmospheric conditions over longer time periods.
Weather includes the sunshine, rain, cloud cover, winds, hail, snow, freezing rain, flooding, ice storms, thunderstorms, steady rains from a cold front or warm front, excessive heat, and heat waves.
Therefore, the correct option is B.
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Which animals use the specialized roles of diver and barrier while participating in cooperative hunting? ants zebra bottlenose dolphins wildebeests
Bottlenose dolphins use the specialized roles of diver and barrier while participating in cooperative hunting.
What is Diver and Barrier?This is a hunting technique used by dolphins in which five of its members form a barrier while one dives to catch the prey.
This is a form of cooperative hunting which therefore makes option C the most appropriate choice.
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Answer:
Bottlenose dolphins
Explanation:
They have been known to work in groups hunting for food, did you know that they make a dirt wall to confuse the fish into jumping over it, that is how they catch their food, the fish jump and they try to catch them in the air
Describe how natural selection can occur in a population.
Answer:
Natural selection occurs when individuals with certain genotypes are more likely than individuals with other genotypes to survive and reproduce, and thus to pass on their alleles to the next generation.
Explanation:
Genes, chromosomes, and DNA are important structures for processes related to heredity and reproduction. How are these structures related?
A
Many chromosomes make up a gene, and many genes make up DNA.
B
A chromosome is the same thing as a gene and both are made of DNA.
C
DNA is made up of chromosomes, and chromosomes are made of genes.
D
Genes are sections of DNA that make up a chromosome.
Answer:
C
DNA is made up of chromosomes, and chromosomes are made of genes.
What evidence in the fossil record supports gradualism?.
Answer:
The evidence in the fossil record that supports gradualism is the intermediate forms of organisms showing graual change. An evolution pattern showing tiny changes in a species gradually adding up to major changes over long periods of time.
Explanation:
When we say that DNA replication is semiconservative, we mean that: None of the other answer options is correct. only half of an organism's DNA is replicated during each cell division. parental DNA stays in the parent cell and daughter DNA ends up in the daughter cell. when DNA is replicated each new double helix contains one parental strand and one newly synthesized daughter strand.
Answer:
each new double helix contains one parental strand and one newly synthesized daughter strand, is the correct answer
What are 2 reasons a species might evolve to become a new species?
which term refers to the fact that the therapist cannot disclose
Which term describes a possible explanation of or answer to a scientific question that is based on prior knowledge or
research and that is testable?
Answer:testing
Explanation:bytrsting and work you good
Y’all I need help, I will give brainliest, or whatever it’s call just please help
Answer:
sorry cant see the image what is the question
Explanation:
How do you think the reef will react to a lionfish invasion if there was no sea urchins?
The population of reefs reduces drastically if there are no sea urchins since lionfish use them as a source of food. That way, the lionfish began feeding on the reef itself.
Most of the carbon in the carbon cycle exists as carbon dioxide in…
A. fossils.
B. the oceans.
C. the atmosphere.
D. nucleic acids.
Answer:
C.
Explanation:
(C).the atmoshphere
How can 2 locations roughly the same distance from the equator (the same amount of sunlight) have such a different climates?
Answer:
Explanation:
Latitude or distance from the equator - Temperatures drop the further an area is from the equator due to the curvature of the earth. The humid subtropical climate is generally located between 25° and 35° latitude on the east sides of continents. Also, temperatures decrease as you move away from the equator.
The brain is an organ in the nervous system.
Which of the following is true about the brain?
Choose 1 answer:
(A) the brain is made up of a single type of tissue.
(B) the brain is made up of different tissues that carry out the same function.
(C) the brain is made up of tissues with different functions that work together.
Answer:
C
Explanation: the brain is made up of tissues with different functions that work together.
The brain is an organ in the nervous system, so the statement that is true about the brain is that the brain is made up of tissues with different functions that work together, which is in option C.
What is the function of the brain as a part of the central nervous system?The brain is a part of the central nervous system, and it is one of the most complex organs in the body which is responsible for coordinating and controlling body functions such as movement, sensation, thought, etc. by receiving and interpreting information from the senses and generating responses to that information.
Hence, the brain is an organ in the nervous system, so the statement that is true about the brain is that the brain is made up of tissues with different functions that work together, which is in option C.
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.
mutations that result in phenotypes that are favored by natural selection are known as
harmful
beneficial
somatic
gamete
Answer:
beneficial
Explanation:
beneficial mutations cause phenotypes that allows organism to have more fitness (like more offspring) and be favored by nature.
What are the top two layers of a soil profile called?.
Answer:
Top two layers of a soil profile is: 1.Top soil and 2. Sub soil.
Explanation:
The soil is arranged in layers or horizons during its formation. These layers or horizons are known as the soil profile.
The different layers of soil are:
1.Topsoil
2.Subsoil
3.Parent rock
Which ,begin emphasis,three,end emphasis, conclusions can be made from the food chain? answer options with 5 options a. organisms give energy to the sun. b. sunlight is the main source of energy. c. consumers get energy from producers. d. energy moves from one organism to another. e. energy moves in both directions among the organisms.
Answer:
Not all the energy is passed from one level of the food chain to the next. About 90 per cent of energy may be lost as heat (released during respiration), through movement, or in materials that the consumer does not digest. The energy stored in undigested materials can be transferred to decomposers.
Explanation:
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State two functions of vascular bundles in leaves
Answer:
Vascular bundle consists of two complex tissues- xylem and phloem. So it has the functions of both.
Functions of vascular bundle:
Transportation of water and minerals from roots to other plant parts and leaves.
Transportation of food from leaves to all other plant parts.
Sometimes, it also serves for support.
Explanation:
Hope it help you
The function of vascular bundles in leaves is transportation of water and minerals from roots to other plant parts and leaves.
What do you mean by vascular bundles?A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in the stem, which exists in two forms: xylem and phloem.
Vascular bundles play important roles in transporting nutrients, growth signals, amino acids, and proteins between aerial and underground tissues.
It is a component of the transport system in vascular plants. It comprises two tissues, i.e. phloem and xylem. Xylem comprises vessel elements, tracheids, xylem sclerenchyma, xylem parenchyma, and xylem fibers.
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What is the scientific name for a bacterial cell?
Answer:
Prokaryotic cells
Explanation:
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Have a good day !
Thank you
help please
BIOLOGY!!
Answer:
provides protection and support
Explanation:
23. Power equals
A.Speed plus endurance
B. Strength times speed
C. Speed times velocity
Neither, power= energy/time
In bears, the codon UUU codes for the amino acid phenylalanine. In mice, the codon
AAA codes for the amino acid lysine. In cats, the codon AAU codes for the amino acid
asparagine. In dogs, the codon GGG codes for the amino acid glycine. Which amino
acid would the codon AAA code for in alligators?
A:Glycine//Because the genetic code is not universal
B:Lysine//Because the genetic code is universal
C:Asparagine//Because the Genetic code universal
D:Phenylalanine// Because the genetic code is not universal
What is thought to have caused the extinction at the end of the Cretaceous period
Answer:
To answer your question the most common belief of the mass extinction of the Cretaceous period was due to an asteroid impact.
Explanation:
which statement about RNA is correct
a. tRNA bonds with mRNA, bringing in amino acids
b. rRNA helps tRNA make a copy of the DNA gene
c. mRNA carries the code of rENA to the nucleus
d. mRNA is made from tRNA drying transcription
Answer:
à
Explanation:
r
tRna bonds with mRna, bringing in amino acids
why were the alpha particles deflected by the nucleus and not attracted to it?
Answer:
Alpha particles are positively charged He nuclei. And the nucleus contains positive charged protons and neutral neutrons. On hitting the nucleus, due to similar charges, alpha particles repel away. (Like repels like)
