Answer:
The first hill of a roller coaster is always the highest point of the roller coaster because friction and drag immediately begin robbing the car of energy. At the top of the first hill, a car's energy is almost entirely gravitational potential energy (because its velocity is zero or almost zero
Explanation:
Because friction and drag start depriving the car of energy right away, the first hill of a roller coaster is always the steepest part of the ride.
What is friction?The resistance to motion created when two objects rub against one another is called friction. Friction occurs whenever two items come into contact with one another. Friction acts in the opposite direction from the motion and works against it. The two surfaces' respective materials have an impact on how much friction exists.
Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction.
Friction and drag start depriving the car of energy right away. Therefore, the first hill of a roller coaster is always the tallest.
Learn more about friction, here:
https://brainly.com/question/28356847
#SPJ2
1. There are
domains.
1
2
3
4
Answer:
3
Explanation:
There are three domains of life, the Archaea, the Bacteria, and the Eucarya.
Answer:
There are 3 domains
Explanation:
the Archaea, the Eucarya, the Bacteria.
in prophase 1 of meiosis, crossing over results in
Answer:
Crossing over results in Genetic Recombination.
Explanation:
What delivers oxygen around your body to different organs and tissues
Answer:
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.
Explanation:
Hope This Help??
Please Mark Me Brainly!!
Which is a valid claim about how meiosis I differs from meiosis II?
Answer:
Homologous pairs of cells are present in meiosis I and separate into chromosomes before meiosis II. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
Explanation:
Hope this helps pls mark brainliest!!!
Tsunami waves are caused by earthquakes in the ocean floor. As the waves approach the shore, they usually grow in height. When this occurs, which aspect of the wave is changing?
A.
amplitude
B.
direction
C.
frequency
D.
speed
E.
wavelength
Answer:
LETTER A. AMPLITUDE
Explanation:
Got it right on the test
What is the MAIN difference between prokaryotic (bacteria) cells and eukaryotic cells?
A. Presence of Cell membrane
B. Presence of Nucleus
C. Presence of Cell Wall
D. Single-Cell vs Multicellular organisms
Answer:
Single cell vs Multicellular organisms
Explanation:
A prokaryote is a single celled organism such as bacteria, whereas eukaryotes are multicellular beings, such as humans and other forms of life made up of multiple cells.
What was the problem is Redi's experiment
a. How do maggots appear in meats?
b. How do worms appear in wood?
c. Is spontaneous generation a valid explanation for maggots in meats?
O d. All of the above are examples of problems.
HURRY PLEASE
Answer: c. Is spontaneous generation a valid explanation for maggots in meats?
Explanation:
What ratio of plants in the offspring would you predict from a Yy x Yy cross?
Answer:
The correct answer is -
The genotype of offspring - 1:2:1 (YY:Yy:yy)
The phenotype of offspring - 3:1 (dominant trait: recessive trait)
Explanation:
In this question, it is stated that there is a cross between Yy and Yy. By the genotype of the parents, we can say that Y is dominant for a particular trait and y is recessive and the parents are in the heterozygous condition in this cross. The gametes these parents will produce are - Y and y and Y and y
then the cross of Yy and Yy would be -
Y y
Y YY Yy
y Yy yy
Offspring from this cross are YY, Yy, Yy, and yy which means the genotypic ratio is - 1:2:1 and the phenotypic ratio is - 3:1 as three out of four are dominant.
Help me please with both of them
Answer:
Routine
neglegted
Explanation:
that is my answer
Difference between phagocytes and red blood cells
Si tu masa corporal fuera 10 kg, ¿qué peso tendrías aquí en la tierra al
nivel del mar?
Answer: 98.1 N
Explanation:
En física, la masa es una magnitud y una propiedad que se mide en unidades, como kilogramos. Por otro lado, el peso es una magnitud vectorial o fuerza que se mide en netown (N). El cuerpo experimenta una atracción hacia la tierra, llamada gravedad, la cual es un fenómenos en donde dos objetos o cuerpos son atraídos entre sí. En este caso, la masa del cuerpo de 10 kg es muy inferior a la masa de la Tierra. Por lo que la atracción del cuerpo hacia la tierra es despreciable, y solo vamos a tomar en cuenta la atracción de la Tierra hacia el cuerpo.
La fuerza de gravedad a nivel del mar es de 9,81 metros/segundos^2. Reemplazando los datos en la ecuación de fuerza, la cual es:
Fuerza = masa x aceleración
obtenemos que:
Fuerza= 10 kg x 9,81 m/s^2 = 98.1 N
Por lo que el peso a nivel del mar es de 98.1 N.
Which of the following is a property of water? (4 points)
It can dissolve only acids.
It expands when it melts.
It exists naturally in only in two states.
It has a low surface tension.
It stores heat energy well.
Answer:
QUESTION NUMBER THREE DONEE YA BOIIIIIIIIII
Explanation:
New alleles can arise in both asexual and sexual reproduction.
Which of the following statements is TRUE based on the disadvantages of sexual and asexual reproduction.
A- Gametogenesis is the only source of genetic variation for sexual reproduction
B- This answer choice is wrong
C- Mutations are the only source of genetic variation for asexual reproduction
D- Meiosis is the only source of genetic variation for sexual reproduction
Answer:
C - Mutations are the only source of genetic variation for asexual reproduction
Mutations are the only source of genetic variation for asexual reproduction.
What is mutation?
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.
A mutation is never so advantageous in real life that it makes someone a superhero or does anything strange like give them wings. There are numerous explanations for why mutations typically don't have significant effects.
Therefore, Mutations are the only source of genetic variation for asexual reproduction.
To learn more about mutation, refer to the link:
https://brainly.com/question/17130462
#SPJ2
Which of the following invertebrates is most closely related to the vertebrates? Select all that apply.
1. echinoderms
2. cnidarians
3. arthropods
4. chordates
Answer:
I would say chordates. (Not absolutely sure so double check)
Explanation:
Chordates have a dorsal nerve cord, which is super close to a spinal cord. (Which vertebrates have.)
Answer: Echinoderms
Explanation:
The Echinoderms deuterosomes mouth development and bilateral symmetry in the larval stage lead some scientists to believe that they are the closest to vertebrates.
A student claims that the lac operon is an example of a mechanism that an organism uses to conserve energy. Evaluate the validity of the student's claim. The claim is invalid because the lac operon requires a bacterial cell to produce extra regulatory proteins and regulatory segments of DNA. The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed. The claim is valid because the lac operon allows a bacterial cell to maintain constant levels of enzymes even when they are not immediately needed. The claim is invalid because the lac operon requires a bacterial cell to constantly produce the lac repressor protein even when lactose is not present.
Answer:
The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed.
Explanation:
The lac operon is a cluster of genes which contain the same promoter sequence and are transcribed as a single messenger RNA (mRNA). This operon is inducible because the presence of lactose in the cell influences its transcription. Lactose can bind to the repressor of this operon, leading to a conformation change in the repressor, thereby preventing the repressor from binding to the operator and thus allowing transcription of the structural genes. After lactose addition, the β- galactosidase enzyme can break this carbohydrate into glucose and galactose, thereby there is no lactose able to bind with the repressor and therefore this operon shuts down. During transcription, the promoter of the lac operon binds both RNA polymerase and catabolite activator protein (CAP) and cyclic AMP (cAMP) complex.
BRAINLIEST!! 5 STARS AND A THANKS!!
Who finally provided enough evidence for the theory of plate tectonics to be widely accepted, and where was this evidence found?
Answer:
Alfred wegener was the one that provided the evidence for plate tectonics
Answer:
Alfred Wegener
Explanation:
German meteorologist Alfred Wegener is often credited as the first to develop a theory of plate tectonics, in the form of continental drift.
Which of the following scenarios represents change to an ecosystem brought about by biotic factors?
a.
a wildfire caused by lightning striking a tree
b.
a flood caused by a severe storm
c.
a landslide caused by cattle overgrazing
d.
a volcano
Please select the best answer from the choices provided
A
B
C
D
Answer:
C
Explanation:
Which food preservation technique is Paul using?
Paul uses____ technique, which is the most modern technique of food processing and preservation. This technique uses____ rays to kills Insects, mlcrobes, bacteria, and fungi In food.
1. Freeze drying
2. Irradiation
3. Dehydration
__________
1. Alpha
2. Beta
3. Gamma
Answer:
Paul uses Irradiation. The technique uses gamma rays
Explanation:
Answer:
Agreed.
irradiation
gamma
Explanation:
Evidence exists that during the millions of years in which the Grand Canyon formed, the canyon divided a single population of tufted-eared squirrels into two populations. One of these squirrel populations, the Kaibab squirrel, now lives in isolation from the other tufted-ear squirrels on the North Rim of the canyon. The other population, the Abert's squirrel lives on the South Rim. Some biologists think that the two populations of squirrels have evolved into two separate species. Other biologists think that the Kaibab squirrel is a subspecies of the Abert's squirrel.
Answer:
A few of the squirrels manage to cross the canyon and breed with the squirrels on the other side.
Explanation:
The formation of the canyon divide the population of the tufted ear squirrels into two different population or species of the squirrels. One is the Kaibab squirrel which lives in the north Rim of the canyon while the other is the Albert's squirrel that lived in the South Rim.
The Kaibab squirrel has a black belly, white tails and tufted ears while the features of the Albert's squirrel is that it has white belly, white tail and tufted ears.
Now the factors that could make the evolution or the formation of the squirrel population in two different species less likely is the few of the squirrels might have crossed the Grand Canyon and moved to the other part and breeded with the squirrels there. So both the species have somewhat similar features.
What are some warming behaviors an animal might perform to warm its body temperature up?
i just need these three labeled and i’m good lol
How can two physically healthy parents produce a child with Down syndrome and a second child with Klinefelter syndrome?
What is NOT a solid waste ? A.Methane B.Grass clipping and leaves C.old cell phones
Answer:
A. Methane
Explanation:
Methane is a gas not a solid. Every other answer choice is a solid.
The diameter of a circle is 6 miles. What is the circle's circumference?
Answer: C=18.85
Explanation: c/circle, hope this helped
ASAP Arizona deserts have been transformed by: chemical fertilizers use of pesticides irrigation canals recycling plants
this is all the points i have 88
Answer:
irrigation canals
Explanation:
Answer:
irrigation canals
Explanation:
Products that we get from our ecosystems that we can use, buy, or sell; are which type of ecosystem service? Group of answer choices, Provisioning services, Supporting services, Cultural services, or Regulating services.
Answer:
Provision Services
Explanation:
A provisioning service is any type of benefit to people that can be extracted from nature. Along with food, other types of provisioning services include drinking water, timber, wood fuel, natural gas, oils, plants that can be made into clothes and other materials, and medicinal benefits.
Why is taxonomy important to scientists?
Researchers used DNA sequencing techniques to find similarities of Hox genes in roundworms, arthropods, mollusks, echinoderms, cephalochordates, and vertebrates. What did they find out about these genes? Select all that apply. A. Hox genes provide information about evolutionary relationships. B. Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times. C. Hox genes are regulatory genes that determine body plans of animals. D. Only some animals that have been tested have Hox genes, suggesting that Hox genes have no function and only evolved recently.
Answer:
(B) Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times.
Explanation:
Hox genes are arranged in clusters and their order on the chromosome is the same as the order in which they are expressed along the body during development.
I hope I helped, and I always appreciate Brainliest!!! :)
Why do ionic compounds conduct electric current when they are dissolved in water?
When a crocodile has birds in its mouth, what symbolic relationship does it represent?
Answer:
The symbiotic relationship between the crocodile and the plover bird is exemplary of two organisms working together. The plover bird flies inside the crocodile's mouth, which may seem dangerous for the bird and food for the crocodile
Explanation: