How can radio-frequency produce heat?
Answers
Answer:
Radio frequency is short for RF, which is a kind of high frequency alternating current electromagnetic wave with frequency range from 3k hz-3k GHz
Because the frequency is high, so the molecular movement speed is fast, and the physical explanation of the heat of the object 100 is its internal molecular movement speed, the use of radio frequency energy to make the molecular high speed movement of course will achieve the purpose of heating
Answer:
Radiofrequency (RF) radiation, which includes radio waves and microwaves, is at the low-energy end of the electromagnetic spectrum. It is a type of non-ionizing radiation. ... If RF radiation is absorbed in large enough amounts by materials containing water, such as food, fluids, and body tissues, it can produce heat.
Related Questions
Design a device that will knock a block of wood a distance of 5 meters.
This was the challenge in science class. Ben and Sam designed a pendulum to move the wood block. Their first design moved the block about 1.5 meters. They rebuilt their pendulum and changed the mass of the pendulum bob. After the changes, the boys knocked the block of wood 4 meters, 6 meters, and finally 8 meters. The average distance the block moved after the final changes to the pendulum was 6 meters. The boys won the design challenge.
Changing the pendulum design after the first trial was an example of _____________ to solve the problem presented by the teacher.
A) designing the model
B) evaluating the model
C) identifying the problem
D) doing research on the problem
Answers
Changing the pendulum design after the first trial was an example of evaluating the model to solve the problem presented by the teacher. So, the correct option is B.
What is Pendulum?A weight suspended from a fixed position in such a way that it can swing back and forth when pulled by gravity is called a pendulum. The consistent and predictable swinging motion of a pendulum makes it useful for many tasks, such as timekeeping, physics investigation, and engineering design.
In the example above, Ben and Sam analyzed their initial pendulum design after the first try and found that it could only move a wooden block about 1.5 meters. He decided that he needed to modify his design. After making adjustments to the mass of the bob, he rebuilt his pendulum. They were able to knock the wooden block over a distance of 4 m, 6 m and finally 8 m after making these adjustments with an average distance of 6 m.
Consequently, changing the pendulum design after initial testing was an example of evaluating the model and improving it as a result of the evaluation findings.
So, the correct option is B.
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Ecoregions of Texas
I do not understand any of these questions and my teacher gave me no pre-reading to do so I am stuck.
Explain which abiotic or biotic factor or combination of factors would be the most influential in creating the ecoregions in west Texas.
Explain which abiotic or biotic factor or combination of factors would be the most influential in creating the ecoregions in east Texas.
Why does vegetation vary so greatly from west to east and from north to south in Texas?
Answers
Answer:
Um.....
Explanation: Well there is rain(abiotic)
um.... And tornatos
And... Wind
Wind and rain seem to be the most influential
the biotic factors would be animals and humans
The east side gets more moisture and the west... Not so much...
name that tune Likes / Dislikes
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ASYNCHRONOUS LEARNING
Assign homework
10 questions PREVIEW SHOW ANSWERS
Question 1 30 seconds
Q. I / like / read / long books
answer choices
I likes reading long books.
I like reading long books.
I like read long books.
Question 2 30 seconds
Q. Patty ____________ going to the movies.
answer choices
don't like
loves
doesn't like
Question 3 30 seconds
Q. My best friend / hate / listen to / classical music.
answer choices
My best friend hates listening to classical music.
My best friend hate listening to classical music.
My best friend hates listen to classical music.
Question 4 30 seconds
Q. We ______________ singing in the shower.
answer choices
loves
likes
love
Question 5 30 seconds
Q. My parents / not like / cook / pasta.
answer choices
My parents don't like cooking pasta.
My parents doesn't like cooking pasta.
My parents don't like cook pasta.
Question 6 30 seconds
Q. I ________ cleaning my room.
answer choices
doesn't like
hate
hates
Question 7 30 seconds
Q. My cat / not like / drink / milk.
answer choices
My cat don't like drinking milk.
My cat doesn't lilkes drinking milk.
My cat doesn't like drinking milk.
Question 8 30 seconds
Q. Luis ______________ watching horror movies.
answer choices
likes
like
hate
Question 9 30 seconds
Q. My mother / love / ride / her bicycle.
answer choices
My mother loves riding her bicycle.
My mother love riding her bicycle.
My mother loves ride her bicycle.
Question 10 30 seconds
Q. Carlos and Luisa ______________ taking pictures.
answer choices
like
doesn't like
don't like
Answers
Answer:
gdtivdgjbdeikbfryiokhgy
During the night, you woke up to strong rains and wind. You’re not exactly sure which kind of storm occurred. In the morning, you see that a tree in your yard is split in two. This is the only damage and debris in the area.
What type of storm most likely caused the damage?
O cyclone
O hurricane
O thunderstorm
O tornado
WILL GIVE BRAINLIEST!!!! SO HURRY
Answers
Which arrow or arrows represent a release of carbon dioxide? What process is occurring at the arrow(s) you selected?
Answers
Arrow 'f' releases carbon dioxide.
Answer:
F I think I am not sure though hope I helped.
What were key documents referenced in the establishing Arizona Statehood?
Answers
Can octopuses grow their fangs back?
Answers
Answer:
hi
Explanation:
i think they can't.But they can regrow their arms
have a nice day
Why do ruminants digest their food in 2 steps
Answers
Answer:
Due to half way digestion the food matter becomes softer than earlier and the animal can chew it well.
Explanation:
Select your answer from the choices below, then write them on its appropriate column.
Answers
Answer: The duties that the students and community members have to be done to save our environment and resources
Explanation: My part as a students
1. Switch off classroom lights and fans when not in use.
2. Plant a tree (in vacant lot / backyard).
3. Join environment friendly groups.
4. Switch to non- plastic water bottles.
5. Switch off faucets in the school or park when not in use.
My initiative as a Community Member
1. Conserve water.
2. Throw garbages in the trash can.
3. Decrease the amount of paper you print.
4. Minimize the use of plastic when buying good
5. Volunteer for clean-up drives.
The correct options that have to be filled in its appropriate column are:
The part as a Student in conserving the environment.
Decrease the amount of paper you print.Switch off classroom lights and fans when not in use.Conserve water.Switch to non-plastic water bottles.Minimize the use of plastic when buying goods.My Initiative as a Community MemberVolunteer for clean-up drives.
Join environment-friendly groups.Plant a tree (in a vacant lot/backyard).Throw garbage in the trash can.Switch off faucets in the school or park when not in use.Thus, these are the correct options for the given columns.
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Questions 1 Compare the direction of the currents in the North Pacific Ocean with those of the South Pacific Ocean How are they like and similar? Explain the reason for the similarties and differences. HELP ASAP WILL GIVE BRAINIEST
Answers
Answer:lol
Explanation:
Write a description or a reason why you are doing this activities of conserving our natural resources.
1. Using a glass when brushing teeth -
2. Hanging clothes -
3. Walking -
4. Feeding the stray animals -
5. Using back page of paper -
6. Using fan -
7. Watering the plants -
8. Sweeping -
Answers
1. Using a glass when brushing teeth: By using a glass instead of leaving the tap running while brushing our teeth, we can conserve water. Freshwater is a finite resource, and reducing unnecessary water usage is essential for preserving our water supplies and ensuring their availability for both humans and the natural environment.
2. Hanging clothes: Opting to hang clothes to dry instead of using a dryer not only saves energy but also reduces greenhouse gas emissions. Clothes dryers consume a significant amount of electricity, and by utilizing natural methods like hanging clothes, we can contribute to reducing our energy consumption and lowering our carbon footprint.
3. Walking: Walking instead of using vehicles for short-distance travel offers multiple benefits. Firstly, it helps reduce air pollution by decreasing the emission of harmful gases from vehicles. Secondly, walking promotes personal health and well-being, as it is a form of physical exercise. Lastly, choosing to walk reduces traffic congestion and saves fuel.
4. Feeding stray animals: Feeding stray animals is an act of compassion and kindness. By providing food for stray animals, we help prevent their starvation and promote their overall welfare. It also reduces their need to hunt for food in natural habitats, preserving the delicate balance of local ecosystems.
5. Using the back page of paper: Utilizing both sides of a piece of paper helps reduce paper waste and conserves valuable forest resources. Paper production involves cutting down trees, and by maximizing the use of each sheet, we minimize the number of trees required to produce paper products.
6. Using a fan: Using a fan instead of an air conditioner helps reduce energy consumption and lowers greenhouse gas emissions. Air conditioners consume a significant amount of electricity, and by using fans to circulate air and provide cooling, we can contribute to conserving energy resources and mitigating the impact of climate change.
7. Watering the plants: Watering plants is essential for their growth and well-being. By providing them with adequate water, we support their ability to photosynthesize, produce oxygen, and contribute to a healthy ecosystem. Additionally, practicing responsible watering techniques, such as using watering cans instead of hoses, helps conserve water resources.
8. Sweeping: Sweeping instead of using a leaf blower or a hose to clean outdoor spaces reduces energy and water consumption. Leaf blowers and hoses consume significant amounts of electricity and water, respectively. Sweeping not only saves resources but also minimizes noise pollution and prevents soil erosion caused by high-pressure water flow.
Engaging in these activities of conserving natural resources demonstrates our commitment to environmental stewardship and sustainable living. By making conscious choices in our daily lives, we can contribute to the preservation and protection of the Earth's ecosystems for the benefit of current and future generations.
MAKE ME BRAINIST
The organisms within an established ecosystem interact and form relationships with each other over time. This interdependence
allows ecosystems to remain relatively stable for hundreds and sometimes thousands of years.
Which of the following would likely increase the population size of an established plant species?
an increase in available nutrients
introduction of a non-native species
0 0 0 0
an extended drought
a sudden change in climate
Answers
Answer:
an increase in available nutrients
Explanation:
Answer:
an increase in available nutrients
Explanation:
this helps them survive, the others do not. Did it on study island
Which examples of artificial selection are caused by human activity without people even realizing it?
Answers
Answer: An increase of tuskless Asian elephants because of ivory poachingGrowing human organs from pig stem cells because of increased research on stem cell therapyA decrease in rams’ horn size because of hunters’ preference for long-horned ramsCows producing milk with more protein because of genetic engineeringChickens producing more meat because of selctive breeding
hi what is a type of poisonous frog name
Answers
Answer: if you're asking for an everyday normal name one is a poison dart frog if you're asking for a scientific name I don't have a clue
Explanation:
I used to be obsessed with frogs and amphibians so its burned into my mind
BRAINLIEST
While savannas and temperate grasslands are both types of
grasslands and share many characteristics, they also have
some differences. Compare them below by writing each
characteristic in the correct location. You will use each only
once.
• home to many types of grazers
• experience all seasons of weather
• home to bison
• home to the African elephant
• example: tallgrass prairies of North America
• example: Serengeti in Tanzania
• also known as tropical grasslands
• few trees due to little rainfall
1)
(Savannas)
(Both Types of
Grasslands)
(Temperate
Grasslands)
Answers
Answer:
S - Savannas are typically found in tropical or subtropical regions.
S - Savannas tend to have more trees and shrubs.
S - Savanna's climate is drier than that of a grassland.
G - Grasslands are found in temperature regions.
G - Temperature Grasslands are mainly devoid of trees, receive less rainfall than Savannas & endure broader temperature extremes.
G - Grasslands make up 25 percent of the Earth's land surface and dominate in regions with limited rainfall, which prevents forest growth. This results from nearby mountain ranges that cause rain shadows over adjacent open-range lands.
B - Both represent the world's richest and most diverse ecosystems. They both provide a home for a quarter of the world's population and a habitat for thousands of plants and animals.
B - Many species gather in vast numbers, graze on the varied grasses, and can be found nowhere else on Earth. The coexistence between wildlife and grasses is key to healthy ecosystems. Animal migrations regenerate the landscapes, by controlling pests, dispersing seeds, and trampling invasive species. Through this partnership, grasslands and savannahs generate vital benefits for both people and nature.
B - Ecosystems such as these two in specific are essential for climate mitigation – they store carbon, locking it deep in the soil and extensive root systems. They are the source of or support many of the world’s biggest rivers and wetlands, ensure food security, support livelihoods, and are embedded in the cultural identity of millions of people.
(Also, A savanna or savannah is a mixed woodland-grassland<---similarity)
Explanation: Just research. I decided to state 3 characteristics for both The Savanna and The Grasslands, and then 3 for "B" (both).
(Both Types of Grasslands) experience all seasons of weather, few trees due to little rainfall
(Temperate Grasslands) home to bison, example: tallgrass prairies of North America
Help please I give brainliest
A simple definition of light energy
Answers
Light energy that uses a different type of energy known as Kinetic Energy that help humans see the light visibly through the eye
List 3 negative impacts does plastic pollution have on the ocean?
Answers
Ingestion
And suffocation
Answer:
Negative physical impact on marine life, chemical impact on the water, and transport of native species.
Explanation:
Negative physical impact on marine life:
Plastic can be dangerous to creatures living in the ocean. Marine animals can fatally swallow plastic, become entangled in it, and even become physically impaired for the rest of their life.
Chemical impact on the water:
Plastics carry chemicals such as PCBs and DDT that can invade the water and cause harm to marine ecosystems.
Transport of native species:
Plastic can carry organisms from one part of the ocean to a relatively remote area. By introducing new organisms to an ecosystem, the flow can be disrupted and result in major consequences.
Which parts of the compound light microscope can be used to improve the quality of the image being observed?
a.) diaphragm and fine adjustment
b.) ocular and high power objective
c.) coarse adjustment and low power objective
d.) ocular and diaphragm
Answers
a.) diaphragm and fine adjustment
or
d.) ocular and diaphragm
but i’m leaning more towards a.)
the photo shows a frozen fruit pop on a hot day. in which direction in thermal energy flowing
Answers
Answer:
The answer is A.
Explanation:
what are real life examples for a chloroplast?? i need them for school
Answers
Answer: Solar panels
Explanation:
The diagram shows one way that genetic information can be passed from a parent to an offspring.
--
Which statement names and best describes the process in the diagram?
A) Meiosis; occurs during asexual reproduction and will not result in genetic variation among the offspring.
B) Meiosis; occurs before sexual reproduction and will result in offspring with different genetic information from the parent.
C) Mitosis; occurs during asexual reproduction and will not result in offspring with different genetic information from the parent.
D) Mitosis; occurs before sexual reproduction and will result in genetic variation among the offspring.
Answers
How did the Industrial Revolution contribute to global climate change?
A. It led to an increased use of alternative fuels other than fossil fuels.
B. It led to an increased use of coal, oil, and other fossil fuels.
C. It led to the release of chemicals that destroyed the ozone layer.
D. It led to the development of nonrenewable sources of energy. (I think it's B. Please correct me if I'm wrong.)
Answers
Answer: You're right its b.
Explanation:
Human activity has rapidly increased the emission of greenhouse gases to the atmosphere. Since the start of the Industrial Revolution, in about 1750, human activities such as burning fossil fuels, including coal and oil, have increased greenhouse gas concentrations in our atmosphere.
How is energy connected?
a) Energy is connected through chemical bonds
b) Energy is not connected
c) energy is connected through light waves
d) Energy is connected as it constantly moves from one place to another
(Explanation is unnecessary, only answer! Thank you in advance!)
Answers
i think the correct answer is..d..
Subduction of ocean crust happens–
OPTIONS
A. at a mid-oceanic ridge.
B. far from tectonic plate boundaries.
C.inside volcanoes of the Ring of Fire.
D. in deep ocean trenches.
Answers
hopes this helps
How does the cardiovascular system interact with the respiratory system?
A.
Blood helps the brain interpret different smells.
B.
Blood helps the lungs to inflate and deflate to breathe.
C.
Blood transports oxygen from the lungs to other organs.
D.
Blood transports nutrients from the stomach to other organs.
Answers
Which material is a main component in batteries?
lead
gold
silver
copper
Answers
Use the drop-down menus to complete the statements. Spindle fibers break down during blank . Chromosomes are pulled apart by the spindle fibers during blank . Chromosomes start to unwind during blank . PLS HELP
Answers
Answer:
telophase
anaphase
telophase
Explanation:
The simple graph shows the relationship between available resources and population size. What evidence does the graph provide? A. An increase in the amount of available resources causes a decrease in population size. B. A decrease in the amount of available resources causes a decrease in population size. C. An increase in the population size causes an increase in the amount of available resources. D. A decrease in the population size causes a decrease in the amount of available resources.
Answers
Answer:
b
Explanation:
Its right
Sorry if not correct
how are osmosis and facilitated diffusion alike?
Answers
They both use passive transport. they don't need energy to move molecules through the plasma membrane.
A student is studying a gray pine (conifer/gymnosperms), an apple tree and an avocado tree. After conducting research about them she discovers some similarities and differences between them. What are some of the differences and similarities she probably discovered? (Hints: think about how they reproduce)