Answer:
8 V
Explanation:
V= IR
V = 4×2
V= 8 V
The answer is the ohms × current
Voltage is an electrical difference of potential across the circuit. The voltage of the bulb is 8V with a current of 2 A and a resistance of 4 ohms.
What is ohms law?Ohms law gives the relation between the current (I) in Amperes, voltage (V) in volts, and resistance (R) in ohms. The formula to calculate voltage is given as,
[tex]\rm V = I \times R[/tex]
Given,
Current (I) = 2 Ampere
Resistance (R) = 4 ohms
Substituting values in the equation to calculate voltage as:
[tex]\begin{aligned} \rm V &= \rm I \times R\\\\&= 2 \times 4 \\\\&= 8\end{aligned}[/tex]
Therefore, 8 V is the voltage developed across the bulb with 4-ohm resistance.
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HELP PLEASE! MULTIPLE CHOICE
1. A species of beetle can be either black or brown in color. The beetle's color is determined by a single gene, and black is recessive to brown. The soil in the area has become darker and closer in color to the black beetles. Which of the following will most likely occur?
Selective pressures will decrease the number of brown beetles.
Selective pressures will increase the number of brown beetles.
Selective pressures will decrease the number of black beetles.
The overall size of the beetle population will continue to decrease over time.
2. Coral snakes are brightly colored, highly venomous snakes with red, yellow, and black bands along their bodies. Another species of snake, called the scarlet king snake, has similar bands of red, black, and yellow. Which of the following describes the conditions that resulted in a large population of king snakes with these types of markings?
King snakes and coral snakes relied on similar food sources that contributed to their unique coloring.
Since king snakes with these markings were avoided by predators, they were able to survive to pass on this trait to offspring.
Coral snakes mated with king snakes often enough to produce another species of king snake with the red, black, and yellow.
Overproduction of offspring increased the likelihood that the genetic mutation leading to these bands would spontaneously occur.
Answer:
answer to number 2 is B
Explanation:
I am confused on number 1
Tornadoes, blizzards, thunderstorms and hurricanes can be classified as?
A: non severe weather
B: severe weather
C: climate
D: temperatures
Answer:
B. Severe Weather.
Explanation:
Hope this can help!
A train travels a distance of 1,200 kilometers in 20 hours. The speed is _________ per __________.
Please help me
Please
Answer:
a
Explanation:
because i think so dont quote me on that though
How would you describe the processes of producing protein from DNA?
Answer:
The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.” Through the processes of transcription and translation, information from genes is used to make proteins.
What does a nucleus do in a cell?
Answer:
The nucleus is known as the brain of the cell, it is the organ of the cell that controls all the cell activities like growth, metabolism, etc. it carries genes, structures that contain hereditary information.
which variable appears to be the control Leaf production in these plants
Answer:
The correct answer is D.
Explanation:
The Temperature
Hope this helps!! ;)
Also scary story for all!!! Enjoy!!
The Haunted Forest
Once upon a time there was a family, made up of two young ones and their parents, traveling by road to road. One day the car broke down in the forest. The parents went out to get help, and so the children would not get bored, they left them with the radio on. It turned night time and the parents still did not return. Then suddenly they heard the disturbing news go on in the radio: A very dangerous killer had escaped from a prison near the forest. Hours passed and the children's parents did not come back. Suddenly, they began to hear something really loud. ¨Bang, Bang, Bang¨. They heard that which seemed to come from something hitting the top of the car. Then, the sound became louder and louder every time. ¨BANG, BANG, BANG¨. The terrified children could no longer resist. They opened the door and ran in a hurry. Only the eldest of the children dared to turn his head to see what caused the loud noise. He should have not done it though, there was a large and scary man on top of the car, who hit the top of the vehicle with something on his hands, they were the heads of his parents! The children began to run even faster and the large man began to run towards them. The children ran into the forest and so did the large man. After that day no one ever saw those children ever again, and who knows, they may appear mysteriously next to you.
Hope you enjoyed!! ;)
Answer:
d
Explanation:
Touch the stigma and notice how it feels. What is the advantage of this type of texture?
A. The sticky texture allows for capture of prey to help with fertilization.
B. The sticky texture allows for the exchange of carbon dioxide to assist with photosynthesis.
C. The sticky texture allows for pollen to adhere to the stigma for fertilization.
D. The sticky texture allows for water molecules to not escape from the plant, thus preventing dehydration.
Answer:
C. The sticky texture allows for pollen to adhere to the stigma for fertilization.
Explanation:
The flower is the reproductive structure of a plant. The STIGMA is a part of the female reproductive system, which is known for its function to receive pollen grains from the male flower during pollination. However, according to factual information and as stated in this question, stigmas are sticky to touch.
The major advantage of this stickiness of stigma is that it allows pollens from the male flower to be strongly adhered to the stigma in order for fertilization to occur.
Which phase of cell division is shown?
Exploring mitosis.
anaphase II
telophase I
prophase I of meiosis
telophase II
Answer:
im assuming its the same question i had, i took the quiz and the answer was telophase I
Explanation:
like i said i took the k12 quiz and got 100%
The phase shown here is anaphase. the correct option is A.
What is anaphase?Anaphase is the stage of mitosis that occurs after metaphase, during which replicated chromosomes are split and newly replicated chromosomes are moved to opposite poles of the cell.
The missing image is attached below.
The image is showing the split of chromosomes, so it is indicating anaphase of cell division.
Thus, the correct option is A.
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What type of energy makes heat
transfer by conduction possible?
A. chemical
B. mechanical
C. kinetic
Answer: C. kinetic
Explanation: On a microscopic scale, conduction occurs as rapidly moving or vibrating atoms and molecules interact with neighboring particles, transferring some of their kinetic energy. Heat is transferred by conduction when adjacent atoms vibrate against one another, or as electrons move from one atom to another.
You will measure and compare the heart rates of ten learners before and after
exercise. Choose ten learners in class who are willing to participate in this activity
They are the runners. Each of these runners must choose a classmate who will
measure his or her pulse rate.
Write down the question you are trying to answer in this investigation.
1.Write a hypothesis about the relationship between exercise and heart rate.
Answer:
Exercise is responsible for the increasing heart beat.
Explanation:
Exercise is responsible for the increasing heart beat because our body needs oxygen more faster during exercise. When we exercise our body needs quick energy and oxygen which can be provided by heart as well as the heart also removes carbondioxide which is produces during respiration process so the heart beat increases in order to provide energy and oxygen to the muscles.
Kingdom Animalia:
Question 9 options:
Eukaryotic
Prokaryotic
Unicellular
Multicellular
Autotrophic
Heterotrophic
Answer:
Eukaryotic
Prokaryotic
Unicellular
Multicellular
Autotrophic
Heterotrophic
Explanation:
-organism having nucleus
-organism without nucleus
-organism having one cell
-organism having many cell
-Organism that can make their own food
-Organism that cannot make their own food.
Which statements describe the inheritance of traits? Select three options.
Traits can be inherited.
No traits are inherited.
Offspring inherit one allele for a gene from each parent.
Offspring inherit two alleles for a gene from each parent.
An offspring with two identical alleles for a trait is hom.ozygous.
An offspring with two different alleles for a trait is hom.ozygous.
come on i have so many questions and i need help
Answer:
It'a the codon 211.....
A person who has only one copy of the sickle cell gene does not have the sickle
cell disease. Is it True or False *
Answer:
I would say False
Explanation:
Since infrared light is not visible, colors were artificially assigned to the photo using the following scheme:
Color Photographed Wavelength
blue 1.05 μm
green 1.25 μm
red 1.60 μm
If all the galaxies shown were composed of the same kinds of stars and nebulae, then the reddest galaxies would
A.
be moving toward us the fastest.
B.
be moving away fastest.
C.
be youngest.
D.
contain the most hydrogen.
Answer: be moving away fastest
Explanation: I got it right in study island
How might knowing that earth's position relative to the center of the Milky Way help you make a map of the Milky away?
2. Why are cell walls useful in plant cells but not animal cells?
What does the word petrified mean?
Answer:
verb (used with object), pet·ri·fied, pet·ri·fy·ing.
to convert into stone or a stony substance.
to benumb or paralyze with astonishment, horror, or other strong emotion:
I was petrified with fear.
to make rigid or inert; harden; deaden:
The tragedy in his life petrified his emotions.
verb (used without object), pet·ri·fied, pet·ri·fy·ing.
to become petrified.
Explanation:
mark me brainliest cs why not ?
Answer:
Extremely frightened that one is unable to move or speak in the moment, also a change of material into rock like substance scientifically.
Overtime, plants will compete, and recreate the forest.
This principle is known as...
?????
Answer:
ecological succession
Explanation:
Answer:
Ecological succession
HELP ASAP I AM SO STUCKKKK!!!!!!!!!!!!!!!!!!!!!
In recent decades, extinction rates have been significantly lower than normal.
-true
-false
Answer:
TRUEEEEEE IS THE ANSWER MADAM
Why might walking across rocks in shallow creek hurt your feet more than the same rocks would if you were in deeper water
Answer:
i think that it is different because in deep water you are more prone to not really touching the rocks with full force but in a shallow creek you are putting a lot of force onto the rocks making it hurt more.I hope this answer is correct.
Explanation:
Over the next 10 years, many of the UK’s nuclear power stations are expected to close.
Suggest how this may affect the future balance of sources of energy used for electricity production in the UK.
Answer:
Greatly affected.
Explanation:
This closing of nuclear power stations greatly affect the future balance of sources of energy used for electricity production in the UK because the burden of production comes on other sources such as production of electricity from fossil fuels, wind and solar radiation etc. If electricity is produced from fossil fuels so it leads to pollution of the environment whereas if the electricity is produced from wind and solar radiation, it is very costly but good for the environment.
List the 5 phases of Mitosis in order
Answer: These phases are prophase, prometaphase, metaphase, anaphase, and telophase.
Explanation:
What would happen if we didn't have a moon?
Answer:
The moon affects the angle of the Earth's tilt. ... The moon influences life as we know it on Earth. It influences our oceans, weather, and the hours in our days. Without the moon, tides would fall, nights would be darker, seasons would change, and the length of our days would alter.
Explanation:
Answer:
Simply said: Night would be a lot darker
Explanation:
The moon is responsible for a lot of things, but two that it's most well-known for is the pull is performs on the earth and lighting the sky at night. The moon reflects light from the sun, allowing us to see better at night, without assistance from outside sources- so simply said, it would be a lot harder to see. Also, the moon pulls the earth towards it, which causes more stability for the planet. A side effect of this are tidal waves.
What do you think some person don’t have traits
Answer:
Why do you think some people don't have traits.
Well everyone has traits that are inherited by their parents.
Explanation:
Ex. Punnet squares
But some people do not have mutations if that is what you are asking, (although it is very very rare)
Hope it helps :)
Sustainability in the modern world means using the world's resources without depleting them.
(Tor F)
Please answer
Answer:
False.
Explanation:
Eventually, all resources would be depleted. Even though it would take generations and it wouldn't be in our lifetimes, it would happen eventually.
what is a DNA 1 paragraph pls :))))))))))
Answer:
DNA is a self replicated material that is inside almost every living animal, and human being. DNA contains genetic codes. Dna holds genes, for example those who created you, there genes are passed on to you causing it to also be in ur DNA. It contains instructions that an organism needs to live, develope and reproduce. DNA serves as the primary unit of heredity in different types of organisms. (It might not be long enough but maybe this could atleast be used as half a paragraph)
Which theory directly
contradicts the concept of
absolute zero?
A. Gravitational Theory
B. Kinetic Theory
C. Matter Theory
A sample of matter experiences a decrease in average kinetic energy as it continues to cool. One would anticipate that the particles will eventually come to a complete stop. The temperature at which particles should theoretically stop moving is absolute zero. Thus, option B is correct.
What theory directly contradicts concept of absolute zero?All molecules are predicted to have zero kinetic energy and, as a result, no molecular motion at absolute zero (273.15°C). Zero is a hypothetical value (it has never been reached).
Absolute zero signifies that there is no kinetic energy involved in random motion. A substance's atoms don't move relative to one another.
Therefore, Kinetic energy because it can create heat which goes against the absolute zero. A gas molecule's kinetic energy tends to zero when the temperature reaches absolute zero.
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what are the parts of heart?
Answer:
There are four chambers of the heart:
The two bottom chambers are the right ventricle and the left ventricle.
The two top chambers are the right atrium and the left atrium.
Answer:
The parts of the heart are the left atrium, the right atrium, the right ventricle, the left ventricle and the valves.
Explanation:
hope this helped.