Answer:
Rate of change = 3π or 9.43
Explanation:
Given the following data;
Initial radius, R1 = 4 inches
Final radius, R2 = 12 inches
To find the rate of change;
First of all, we would determine the area of the circle.
Mathematically, the area of a circle is given by the formula;
Area of circle = πr²
For initial radius, R1;
Area of circle, A1 = πR1²
Area of circle, A1 = 4π square inches
For final radius, R2;
Area of circle, A2 = πR2²
Area of circle, A2 = 12π square inches
Now, we can find the rate of change;
Rate of change = A2/A1
Rate of change = 12π/4π
Rate of change = 3π (in terms of pie).
Equatorial diameter of earth is not identical to polar diameter which one is greater and why
Answer:
The Earth spins on its axis once in 24 hours. Anything that is being spun in a circle, like a stone tied on the end of a piece of string, experiences an apparent force trying to fling it outwards. This is called centrifugal force (or centripetal - I’m not going to get into the argument here that people often have about whether it’s a ‘real’ force or not) and it arises from the fact that a body in motion wishes to continue in a straight line - unless a force acts upon it. In the case of a stone being twirled around on the end of a buit of string, the string transmits the force of the hand that is holding the string and pulls inward on the stone, forcing it to travel in a circle around the person.
Which of the following is not true of the Pyramids of Giza?
Answer:
there are no options so cant help
Write down two causes of variation.Give an example for each
Answer:
Mutations, gene flow, and sexual reproduction are all major causes of variation. By altering the genes of individuals in a population, DNA mutation causes genetic variation. As new individuals with different gene combinations migrate into a population, they cause genetic variation.
Explanation:
B)
Write the letter of the term or phrase that best matches the numbered description. _____ 1. produces electrical energy chemically _____ 2. energy sources that are still in development _____ 3. includes lifestyle changes _____ 4. produces electrical energy using the temperature difference between two layers of water a. alternative energy b. fuel cell c. energy efficiency d. energy conservation e. ocean thermal energy conversion (OTEC) _____ 5. percentage of energy that does useful work
Answer:
1. B
2. A
3. D
4. E
5. C
Explanation:
Energy can be defined as the ability (capacity) to do work. The various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.
The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.
Some of the terminologies associated with energy includes the following;
1. Fuel cell: produces electrical energy chemically. It is a technology that operates just like batteries but do not need to be recharged since it doesn't run down. Also, it comprises of two (2) electrodes which are: positive electrode (cathode) and negative electrode (anode), with an electrolyte embedded in between them.
2. Alternative energy: energy sources that are still in development. These includes energy source other than fossil fuels. Some examples are petroleum, diesel and coal.
3. Energy conservation: includes lifestyle changes. It involves energy saving actions in order to reduce the level of energy consumption such as daylight savings, energy saving bulbs, etc.
4. Ocean thermal energy conversion (OTEC): produces electrical energy using the temperature difference between two layers of water.
5. Energy efficiency: percentage of energy that does useful work. It determines the amount of work that can be done at a particular time.
Circle J is congruent to circle P.
If OK = 2x, QR = 12, and RT = x + 3, what is the length of chord KM?
8
9
10
12
Answer:
9
Explanation:
Exit Ticket: How can Nationalism and Patriotism lead to a national movement by its citizens?
Answer:
The act of patriotism and feeling patriotic are things which will make for a stronger nation. Not only will you be able to relate well to others in your shared love for this country but the more individuals who express their patriotic feelings, the stronger our country will be as a whole
Explanation:
guys this is very important to improve my grades!!
what is a diagram that shows what the inside of something looks like?
what do you know about erosion? what are some natural things that cause erosion and where might we see this happen where we live?
Answer:
Explanation:
Erosion is when soil or earth is moved and can damage property, buildings, roads etc. This can happen due to large flooding where the soil supporting a structure is moved leading to said structure failing.
Why might a post-classical civilization want to conquer Egypt and the Nile River Valley?
Why might a post classical civilization want to conquer Egypt and the Nile River Valley? It's fertile land provided the foundation for the first human civilizations and its access to the Persian Gulf and location between Europe, Asia, and Africa made it a center of trade.
Where is the location where the Jewish migration ended ?
True or False: Our galaxy, the Milky way, is abnormal and the things that happen in it are not like any other galaxy in the universe.
Answer:
I think it's true
Describe the difference between a typical galaxy and a quasar.
Answer: Hello, There! Your Answer is Below
Quasars can only exist while sufficient material is falling into the accretion disc. Once the material runs out the active galaxy becomes a regular galaxy. The quasars which have been observed are billions of light years away. This means that they are young galaxies as seen in the early universe
Explanation:
Quasars live only in galaxies with supermassive black holes — black holes that contain billions of times the mass of the sun quasars have luminosities thousands of times greater than a galaxy such as the Milky Way. Usually, quasars are categorized as a subclass of the more general category of AGN. The redshifts of quasars are of cosmological origin.
Hope this helps!
Have a great day!
-August~
Write a paragraph explaining where DNA is located in the cell and what makes up DNA (there are multiple parts)
I’ll give brainiest pls I just need a paragraph about it pls
Find the value of X.
120+x=180
Answer:
60
Explanation:
subtract 120 from 180
Answer:
x=60
Explanation:
120+x=180
x=180-120
x=60
is longitudinal extension of Ethiopia results in tropical climate
Answer:
Explanation: I don know man
Japan has a very small land area (about the size of California), but has over 120M people (4x the number of people of CA). On top of that, most of the country, as you see in the picture, is mountains. How do you think Japan adapts to having such a large population living in such a small land area?
Why has some tropical grassland in Africa become desert, like the Sahel?
Answer:The Sahel contains the fertile delta of the Niger, one of Africas longest rivers. Unfortunately, the Sahels fertile land is rapidly becoming desert as a result of drought, deforestation, and intensive agriculture. This process is known as desertification.
Explanation:
Answer: bc of loss of water plus African Humid Periods Paced by Earth's Orbital Changes.
Explanation:
i hope this helps ;) - Mal
1. When describing North Korea, "isolation" refers to the country's lack of: a. Major cities b. Neighboring countries c. Contact with the outside world d. News organizations
3. Describe the Milky Way galaxy in terms of galaxy types?
Can I please get some help?
Explanation:
I HAVE NO IDEA!! sorry :)))))))
Hiiioo! Can someone please help me out! ❤️:D
Which country is located farthest west?
*
Nepal
Pakistan
Bhutan
Sri Lanka
Answer:
pakistan
Explanation:
Write any 3 work that was related tk Ravana's death ? What things were done by him ?
The one who gave this answer will be a true Hindu ....
Explanation:
Lord Rama asked his brother Lakshman to go to Ravana and learn something about the world. Lakshman obeyed his brother’s order and stood near dying Ravan’s head. But Ravan did not say anything and Lakshman returned to Rama. Rama then told Lakshman that whenever one wants to learn something from a person, you should never stand near his head, but his feet.
Lakshman again went to Ravana and this time he stood near his feet. Ravan aseeing Lakshman standing near his feet told him Three main secrets that would make anyone’s life successful.
1 - The first thing Ravan told Lakshman was that one should complete any auspicious work as soon as possible and keep delaying the inauspicious work as much possible.
He told Lakshman that he could not recognize Rama and therefore delayed arrival at the shelter. Hence this is his condition.
2 - The second thing he taught Lakshman was never to underestimate one’s enemy. He said that he did this mistake of understanding the monkeys and bears lesser or incompetent and he lost the battle against them.
He said, when he asked Lord Brahma to make him immortal, he said no one else except for monkeys and human could kill him. This is because he believed that both these living beings were not capable to kill him.
This was his mistake and he suffered life as a result.
3 - The third and final thing Ravan told Lakshman that one should not reveal one’s life secret to anyone in the world. Here also Ravan made a mistake as Vibhishan knew the secret of his death. Ravan knew this was his biggest mistake of life.
Why were immigrants treated differently at Angel Island and Ellis Island?
A. The people screening immigrants at Angel Island were motivated by racial prejudice.
B. The people screening immigrants at Angel Island treated suspected communists poorly.
C. The people screening immigrants at Angel Island were told to reject unskilled workers.
D. The people screening immigrants at Angel Island treated Catholic Europeans poorly.
Answer:
immigrants at Angel Island were not treated fairly they were detained the for long period of time in filthy living conditions.
what do many schools use Earth Day to teach students ?
Answer:
to inspire students and make an impact
Explanation:
B)
what is crust,mantle and core means?
pwease help brainliest for the correct answer
how did the US government use boarding schools to assimilate natives into white culture? did the US government use boarding schools to assimilate natives into white culture?
Answer : tried assassination and were threatened
Explanation ( pls read ) :
Carlisle and other boarding schools were part of a long history of U.S. attempts to either kill, remove, or assimilate Native Americans. In 1830, the U.S. forced Native Americans to move west of the Mississippi to make room for U.S. expansion with the the Indian Removal Act. But a few decades later, the U.S. worried it was running out of places to relocate the country’s original inhabitants.
“As white population grew in the United States and people settled further west towards the Mississippi in the late 1800s, there was increasing pressure on the recently removed groups to give up some of their new land,” according to the Minnesota Historical Society. Since there was no more Western territory to push them towards, the U.S. decided to remove Native Americans by assimilating them.
10. Which of the following Caribbean islands have dense equatorial forests?
a. St Kitts and Nevis
b. Guyana
c. Jamaica
d. Barbados
Answer:
Barbados... i think lol
Explanation:
Bamboo and tea are found in the _____ of east Asia.
Answer:
C. humid continental and subtropical regions
Explanation:
The arabian peninsula has a humid tropical climate
Answer:
In Arabia, the relative humidity is often very low, sometimes as low as 2-5%. (Yes, you can dry a full load of washing outdoors in less than two hours.) So on those occasions when it soars to over 70%, it can become unbearable if the air temperature is in the high 30s or 40s Celsius.
Explanation: Tell me if I am wrong