BRAINLIESIT IF CORRECT
Light waves are electromagnetic waves that can travel through a vacuum.
True
False
7
Answers
Answer: True
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Hope This Helps!
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Related Questions
Which is the anode and which is the cathode?
2H+ + 2e- ➖> H2 (g)
2I- ➖> I2 + 2e-
Answers
Answer:
2l- ---> l2 + 2e- is the anode
2H+ + 2e- ---> H2(g) is the cathode
Explanation:
Oxidation occurs when a metal loses two or more electrons in a redox chemical reaction and reduction is when it gains. Thus, oxidation is the anode and reduction is the cathode.
I HAVE ALREADY CHOSEN WATER POLLUTION SO STICK WITH THAT PLEASE!!!
EACH ONE IS A STEP NOT AN ANSWER!
Directions: Pick an environmental issue that is impacting the world today. Answer the following research questions about your chosen environmental issue
For full credit, you must identify your environmental issue and answer all six research questions in your own words and in full sentences.
What is your selected environmental problem?
1) What is the cause of your selected environmental issue (why is this happening)?
2) What effects has your selected issue had on the environment and human health?
3) What are the possible, future effects of this problem on the environment and human health?
4) What is currently being done to solve this issue? Any laws or policies in place?
5) Do you think this is an environmental issue that needs to be solved? Why or why not?
6) What can your classmates do to help?
Answers
Answer:
Written below. Hope this helps!
Explanation:
1. Why is water pollution happening? Water pollution occurs when huge bodies of water like groundwater, oceans, rivers, and lakes are contaminated with harmful chemicals and bacteria. This is due to the waste product directly thrown into the water.
2. What effects has water pollution had on the environment and human health? Contaminated water can harbor bacteria, such as those responsible for diarrhea, cholera, dysentery, typhoid, hepatitis A, and polio. According to the UN, every year, approximately 297,000 children under five die from diseases linked to poor sanitation, poor hygiene, or unsafe drinking water.
3. What are the possible, future effects of water pollution on the environment and human health? Population growth, economic development, urbanization, and climate change will have a big impact on water issues by 2050.
4. What is currently being done to solve water pollution? Working with public works departments to limit road salt use, to prevent chlorine from getting into the water. Helping businesses reduce their use of hazardous chemicals. Promoting agricultural land use practices that protect rivers and streams. Advising homeowners with fuel tanks on preventing dangerous spills.
5. Do you think water pollution is an environmental issue that needs to be solved? Water pollution needs to be solved because: Poor water quality has its most direct impact on aquatic wildlife, particularly fish, bugs, and plants. Excess nutrients, sediment, road salt, and other contaminants can reduce the variety and hardiness of organisms living in the state's waters.
6. What can your classmates do to help stop water pollution? How to help stop water pollution?
You can . . .
Dispose of Toxic Chemicals Properly.Shop with Water Pollution in Mind.Do Not Pour Fat and Grease Down the Drain.Use Phosphate-Free Detergent and Dish Cleaner.Check Your Sump Pump or Cellar Drain.Dispose of Medical Waste Properly.Eat More Organic Food.Report Water Polluters.Answer:flooding
Explanation: people keep on throwing their old belonging in the drains and snack packs and it clugging up
How could I use the word *SOLUTE* in a sentence. It's the science term for solute.
Answers
Answer:
Explanation:
You can use it in
The minor component in a solution, dissolved in the solvent.
sry if its from vocab
In one to two sentences, explain how the loss of Arctic sea ice may affect the ocean currents and climate near the Western European coast
Answers
The cold tide may cause the Atlantic currents that bring warmth to Western Europe to slow down. According to NASA's news release, disruptions to the Gulf Stream would have a negative impact on ocean life and the communities that rely on it.
What happens if Arctic ice melts?If all the ice on Antarctica, Greenland, and in mountain glaciers around the world melted, sea level would rise by approximately 70 meters. The ocean would engulf all coastal cities. And the land area would be significantly reduced.
The loss of older ice indicates that the Arctic ice cover is thinning. Evidence also suggests that the melt season has lengthened; ice is melting earlier in the year and freezing later than it used to.
Thus,The cold tide could slow the Atlantic currents that bring warmth to Western Europe. Disruptions to the Gulf Stream, according to NASA, would have a negative impact on ocean life and the communities that rely on it.
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Properties of cotton ball
Answers
Answer:
1. Absorbent
2. Breathable.
3. Hypoallergenic.
4. Non-toxic.
5. High wet modulus (stronger when wet)
6. Biodegradable.
7. Excellent wicking.
8. Wipe dry performance.
Answer:
Stringy, light, spherical, absorbant, small, and thread-like (because you can make cotton into clothes).
1 more please Chromosomes:
Answers
Answer:
D. All of the above!!
Explanation:
Chromosomes will contain many genes, are made of DNA [hence X and Y chromosomes ;) ] and can definitely be found in the nucleus of a cell
Is the answer
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
What causes all landforms to take shape and develop?
A. Wind, water, and ice cause the surface of Earth to change and the result is landforms.
B. Wind, water, and human activity cause the surface of Earth to change and the result is landforms.
C. Only wind causes the surface of Earth to change and make landforms.
D. Ice expanding on the surface of Earth cause landforms to develop.
Answers
Answer:
A
Explanation:
Although Leonardo Da Vinci was well-known for being an artist, how has he contributed to the fields of motion and medicine?
Thx if you help :D
Answers
What is the series of energy transfers shown in the picture below?
A) chemical to mechanical to electrical to thermal
B) mechanical to chemical to thermal to electrical
C) electrical to thermal to mechanical to chemical
D) thermal to mechanical to electrical to chemical
Answers
Answer:
The correct answer is A.
Why is this picture an example of a physical change?
Answers
Answer:
A physical change because the molec are staying the same
Explanation:
V
Answer:
This picture is an example of physical change because...
The change made was physical.
Explanation:
The pencil physically made a line on the paper. (We can see it)The pencil physically broke. (We can see the broken lead)Out of the 3 of these
Protons Neutron and electrons witch of these are responsible for a charge that can be transformed from one object to another.
Answers
What causes water pollution?
Answers
Answer:
Good answer below, just adding on
Explanation:
Runoff of chemical products, animal waste, and especially human waste products such as different types of trash like scrap metals and plastic greatly increase water pollution. Additionally, oil leaks and spills can also lead to severe water pollution. As a general statement I'd say that human activities that are not monitored and are either directly dumped into water ways or are caught in run off cause water pollution.
Which statement best explains the difference between solutes and solvents?
A. a solute dissolves in a solvent.
B. a solvent dissolves in a solute.
C. neither one dissolve to form a solution.
D. both dissolve equally to form a solutionon 1
Answers
Answer: A
Explanation:
A small amount of solute is dissolved in a larger amount of solvent a solid is stirred into a liquid and dissolves so
Hopefully this helps!!
Which statement about exothermic reactions is true?
Responses
The reactants create energy to form products.
Energy from an outside source is continuously being added.
More heat is given off than is put into the reaction.
The reaction container always feels cold.
Answers
Answer:An exothermic reaction may be defined as a type of reaction in which energy is significantly liberated in the form of heat or light. In such types of reactions, energy is generally transferred into the surroundings rather than utilized from the surroundings.
The option "energy from an outside source is continuously being added" represents an endothermic reaction in which heat or light energy is externally been provided. The option "more heat is given off than is put into the reaction" is not absolutely true because exothermic reactions liberate energy but it does not matter if it is higher or lower than that of being put into the reaction.
Therefore, the reactants have more heat energy than the products is a statement that is true about exothermic reactions. Thus, the correct option for this question is C.
Explanation:
you welcome
Energy from outside sources is continuously being added, since its an exothermic reaction it always focusses on releasing large amount of energy upon activation and combustion.
It cuts off on giving energy back to its surrounding unlike endothermic reaction where the generated energy is given back to the environment to restore its energy levels.
Therefore, it makes it clear that exothermic reaction is a type of reaction that uses combustion to gather the energy lying around in the surrounding to generate large amount of energy and heat and keeps on producing heat until and unless there is energy in surrounding.
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Ms. Hunziker’s toaster uses 60 amps of current and has a resistance of 10 ohms. What voltage would be needed for the toaster to operate correctly? plz help ill brainleist
6 volts
600 volts
60 volts
0.6 volts
Answers
People use hot air balloons to rise high above the ground and be pushed by air currents from one place to another. The diagram shows a hot air balloon.
A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners.
a. Describe a likely result of this chemical reaction that allows a hot air balloon to rise.
b. Describe a design feature the distance a hot air balloon can travel. Explain your reasoning.
Answers
Fueled by propane cylinders, gas jets produce the hot air that fills the envelope (similar to ones you might use on a portable camping stove).
WorkingSince heated air rises, hot air balloons are functional. with the rest. As though it were floating in water, the balloon rises as a result of this. The balloon naturally starts to slowly deflate if the air is allowed to cool.The molecules in the air start to migrate and spread out as the air within the balloon is heated, which results in a decrease in the air's density. The heated air is pushed below the cooler, surrounding air. the warm air is pushed upward as a result of this.For more information on hot air balloon kindly visit to
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Research on measures taken to reduce the impact of thermal and nuclear electricity.
Answers
A gradual change over time in a species that enables the species to better survive in its environment is known as a(n)
A. adaptation
B. habitat
C. population
D. competition
Answers
Answer:
Adaption
Explanation: the definition of adpation is to learn how to survive or to learn what to do to be better or wtvr
I need help quickly, this assignment is due in a few hours. I have a few 8th grade science questions I need help with. These is not need to explain your answer, just tell me if the answer is a,b, or c. Also, please answer all of the questions listed not just some of them. I will be giving 20 points if you answer, and brainly to the first person to answer. The questions look really complicated but it is mainly just a long description. The questions themselves seem simple.
QUESTION ONE : Miranda was learning to bake bread at home. Her first few batches of dough did not rise, or expand, as much as they should have. Miranda's mother noted that the kitchen was cold and suggested that the dough might not be warm enough to rise. Miranda decided to test her mother's suggestion. She made a large batch of dough and divided it into six equal-sized balls. Then, she put each ball into a bowl. She left three bowls on the counter in the kitchen, where the temperature was 63oF. She left the other three bowls on her desk in her upstairs bedroom, where the temperature was 80F. After one hour, Miranda measured the size of each dough ball.
Which of the following was the dependent variable in the experiment?
a. the temperature where the dough was left to rise
b. the ingredients used to make the dough
c. the size of each dough ball
QUESTION TWO: Jada liked to make guacamole, but she could often find only unripe avocados at the grocery store. In biology class, Jada learned that ripe fruits produce a gas called ethylene that can cause other fruits to ripen. Jada wondered whether storing ripe bananas with unripe avocados would make the avocados ripen faster. Jada prepared four paper bags with five unripe avocados in each bag. She added on ripe banana to two of the bags. Then, Jada sealed all four bags. After three days, she opened each bag and counted the number of ripe avocados in each bag.
Which of the following was the independent variable in this experiment?
a. the type of paper bag used
b. the number of bags with a ripe banana
c. the number of ripe avocados
QUESTION THREE: Colette was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into tub filled with salt water for eight hours. Colette wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Colette cut ten squares of steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares into a tub filled with vinegar. Once an hour for eight hours, Colette counted the number of rusted steel squares in each group.
Which of the following was a variable that was held constant (control variable) in this experiment?
a. the type of liquid used
b. the size of the squares of steel sheet metal
c. the number of rusted steel squares
QUESTION FOUR: David divided 40 unripe bananas evenly among eight paper bags and sealed the bags. He poked 20 small holes in four of the bags and left the other four without holes. He kept the bags at room temperature for three days. Then, David opened the bags and counted the number of brown spots on each banana. He compared the average number of brown spots on bananas from bags with holes to the average number of brown spots on bananas from bags without holes.
Identify the question that David's experiment can best answer.
a. Do bananas develop more brown spots when they are kept at room temperature compared to in a cold refrigerator?
b. Do bananas develop more brown spots if they are kept in bags with holes compared to bags without holes?
c. Do bananas develop more brown spots when they are kept in brown paper bags compared to in a plastic bag?
QUESTION FIVE: Ten groups of chemistry students combined three solutions that, when mixed, chemically reacted and turned blue. Before mixing, five groups of students heated the solutions to 25C, and five other groups heated the solutions to 50C. The students recorded how many seconds it took for the mixtures to turn blue. Then, the groups shared their results, and the class compared the time it took for the mixtures to turn blue at 25C and at 50C.
Identify the question that the students' experiment can best answer.
a. Does the type of color the mixture produces depend on the temperature of the solutions?
b. Does the mixture of solutions release more gas when they are mixed at 25C compared to 50C?
c. Does the mixture's color change faster when the solutions are mixed at 25C or 50C?
Answers
Question 2: A
Question 3: B
Question 4: B
Question 5: C
Which of the following best explains the relationship between peak-to-peak amplitude and semi-amplitude?
Answers
Answer:
A. Semi-amplitude is half the distance of the peak-to-peak amplitude
Explanation:
The correct answer is : The semi-amplitude is half the distance of the peak-to-peak amplitude (option A). The peak-to-peak amplitude is the total distance between the highest positive peak and the lowest negative peak in a waveform. It represents the full range of variation in the amplitude of the waveform.
The peak-to-peak amplitude of a waveform is the measurement of the total distance between the highest positive peak and the lowest negative peak. It provides information about the full range of variations in the amplitude of the waveform. Mathematically, it is calculated by subtracting the minimum value from the maximum value of the waveform.
Learn more about the amplitude here.
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Other Performance: Research how animals produce, transmit, and receive sounds of various frequencies. Enter the data you gathered in the table.
Answers
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
which is not an independent variable
Answers
Option B (Signal strength at the computer). This variable sounds like something that would be measured - and is affected by the independent variables, this variable is known as the dependent variable.
A student wants to determine the effect of mass on kinetic energy. She will drop two balls of the same size into a pool of water. Which investigation method should the student use?(1 point)
a. She should drop two balls of the same mass from different Hights.
b.she should drop two balls with different masses from the same Hights
c.she should drop two balls with different masses from different Hights
d.she should drop two balls of the same mass from the same Hights
Answers
Explain how potential and/or kinetic energy are working in each of the pictures below
Answers
Answer: canetic carts
Explanation:
In the second one, it begins with potential energy, until the person is put into a falling motion, transferring to kinetic energy.
In the third one, there is potential energy, because the bow string is taut, and ready to release and allow the arrow to go flying.
In the fourth one, the car has gas which is potential energy, until it begins moving and is turned into kinetic energy.
Will give 100 points!
An earthquake has a high magnitude but a low intensity. Which statement best explains this?
A. Magnitude measures the energy released by the earthquake, while intensity measures the amount of damage.
B. Magnitude measures the duration of the earthquake, while intensity measures the amount of damage.
C. Magnitude measures the duration of the earthquake, while intensity measures the energy released by the earthquake.
D. Magnitude measures the energy released by the earthquake, while intensity measures its duration.
The National Seismic Hazard Map classified one location as having the “highest hazard” and another location as having the “lowest hazard.” Based on this classification, which conclusion can you draw between the "highest hazard" and "lowest hazard" locations?
A. "Highest hazard" locations are better prepared for an earthquake than the "lowest hazard" locations.
B. There will never be an earthquake in the "lowest hazard" location in the future.
C. There will definitely be an earthquake in the "highest hazard" location.
D. There is more likely to be an earthquake in a "highest hazard" location than in a "lowest hazard" location.
How are P waves different from S waves?
A. P waves move under Earth’s surface, and S waves move along Earth’s surface.
B. P waves cause damage, and S waves do not cause damage.
C. P waves travel slowly, and S waves travel quickly.
D. P waves push and pull in the same direction as the wave, and S waves move up and down.
What does a seismograph record?
A. the distance from the epicenter of an earthquake
B. the vibrations produced by an earthquake
C. the amount of damage that results from an earthquake
D. the total amount of energy released by an earthquake
Answers
1. Magnitude measures the energy released by the earthquake, while intensity measures its duration. The correct option is A.
2. The conclusion you can draw between the two conditions is that there is more likely to be an earthquake in a "highest hazard" location than in a "lowest hazard" location and is denoted as option A.
3. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.
4. Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network.
What happens to the atoms that make up hydrogen fuel as it burns?
Answers
Answer:
When hydrogen fuel burns, its atoms combine with oxygen atoms in the air, which creates a chemical reaction that releases energy in the form of heat and light. The hydrogen atoms lose their outermost electrons, becoming positively charged ions (protons). These ions combine with the oxygen atoms to form water molecules (H2O), which evaporate into the air as steam. Therefore, the atoms that make up hydrogen fuel ultimately become part of water molecules during the process of combustion.
Explanation:
Which of these is a covalent compound?
AlCl3
CO
LiCl
MgO
Please answer correctly!
Answers
Answer:
Not sure maybe CO
Explanation:
piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap
Answers
Answer: Food
Explanation:
The rat smells the food or sees the food it goes towards the food to eat it.