Which statement below describes a physical property of a substance?
A. Helium gas floats because is less air dense than air
B. Sulfuric acid is a toxic liquid
C. Iron rusts when exposed to water and air
D. Sodium metal explodes when exposed to water
Answers
Answer:
A
Explanation:
Because density is a physical property and the rest are all chemical properties
Answer:
A
Explanation:
Related Questions
True or False. The elements that make up the reactants must be present in the products.
Answers
Answer:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
Explanation:
think about the statement "every decision has an environmental impact"?what decision do you make that add carbon dioxide to the environment?what decision do you make that would add less carbon dioxide to the environment then you currently add?
Answers
Explanation:
Certain actions and/or their method can affect the environment, such as leaving the sink on while brushing your teeth or not turning off a light when you leave the room. I personally make decisions to prevent my association with Greenhouse gases by turning off lights when I leave a room, using minimal water, recycling, etc.
Answer:
Answers may vary. View explanation.
Explanation:
There are every day decisions that may add carbon dioxide to the environment.
Problems:
Burning of fossils fuels. Example: Using cars as transportation. The average car releases around 4.6 metric tons of carbon dioxide per year.Deforestation. Carbon dioxide is released from dead organisms such as trees. Example: As of 2021, 15 billion trees are lost to deforestation.Solutions:
Instead of taking your car to work or school, carpool with a friend. Riding your bike and taking the bus are also good solutions that help minimize carbon dioxide releases.In spare your time, grab a couple of friends and plant some trees! Even planting just a few trees is a great start to help the planet.Have a great day!
2) In the formula p=mv, identify the word that each letter stands for.
Answers
Answer:
p = momentum
m = mass
v = velocity
Hope this helps!
Which part of the ear converts vibrations into nerve impulses?
cochlea
auditory nerve
outer ear
eardrum
Answers
Answer:
cochlea
Explanation:
The cochlea is filled with a fluid that moves in response to the vibrations from the oval window. As the fluid moves, 25,000 nerve endings are set into motion. These nerve endings transform the vibrations into electrical impulses that then travel along the eighth cranial nerve (auditory nerve) to the brain.
:)
The cochlea is filled with a fluid that moves in response to the vibrations from the oval window. As the fluid moves, 25,000 nerve endings are set into motion. These nerve endings transform the vibrations into electrical impulses that then travel along the eighth cranial nerve (auditory nerve) to the brain.
Can you make some notes related to these texts?
Answers
Answer
Explanation:
ddssfdxfghfchgj
• Acceleration: change in velocity compared with the time it takes to change
- Average Acceleration: (Final Velocity - Starting Velocity) / Time
• Velocity: expressed in meters per seconds (m/s)
• Time: expressed in seconds (s)
• Acceleration is measured in meters per second per second
- meters per second squared (m/s²)
Picture #2:
• Acceleration is a vector
- magnitude
- direction
• Acceleration: increases and decreases in speed
• Positive Acceleration: increase in speed
- sliding down from a hill
- small velocity -> large velocity
• Negative Acceleration: decrease in speed
- car slowing then
- high velocity -> low velocity
- initial velocity is larger than final velocity
- (v2 - v1) will be negative
- acceleration “a = (v2 - v1) / t” will be negative
• Acceleration and velocity (rate of motion) in the same direction = speed will increase.
• Acceleration and velocity in opposing directions = speed will decrease
Picture #3:
• Acceleration: rate at which velocity changes
• Velocity is a vector: has magnitude & direction
- magnitude or direction changes = the velocity changes
• Object accelerates speed = direction of motion or both magnitude and direction changes
• Acceleration depends on amount of time for the change to take place and how much velocity changes
- Small change in velocity can be a large change in acceleration if the change occurred quickly.
- Large change in velocity can be a small change in acceleration if the change occurred slowly.
- Increasing speed by 5 m/s in 5 seconds is smaller acceleration to increase speed by 5 m/s in 1 second.
Picture #4:
• An object changing the direction of motion experiences acceleration even when not speeding up or slowing down
• An object is always turning.
• Centripetal Acceleration: acceleration in circular mode.
describe the relationship between the mass of the ice and the transfer of thermal energy in the investigation. Use evidence and scientific reasoning to support your answer. (Use the following words: Molecules, Kinetic Energy, and Heat.
PLEASE HELP
Answers
Answer:
Explanation: 1234456
identify the for of energy
(A)thermal
(B)kinetic
(C)chemical
(D)electrical
Answers
Answer:
C Chemical Energy
Explanation:
food gives us chemical energy which may be transformed to other later..
please mark me brainliest
Description
chemical energy, Energy stored in the bonds of chemical compounds
A dog whistle has a high frequency. What can you infer about the dog whistle?
It would be very loud.
It would have a high pitch.
It would have a high amplitude.
It would have a long wavelength.
Answers
Answer: It would have a high pitch.
Explanation: since the whistle has a high frequency, I can infer that it will have a high pitch.
Answer:
it would have a high pitch
Explanation:
like if u take a hearing test the sounds are usually high pitch
When an Alka-Seltzer® tablet is put in water, there is a chemical change because there are bubbles produced. The Alka-Seltzer® tablet slowly disappears over time. What would speed up the chemical change?
Adding more water would cause the chemical change to speed up.
Changing the color of the tablet would cause the chemical change to speed up.
Decreasing the temperature of the water would cause the chemical change to speed up.
Increasing the temperature of the water would cause the chemical change to speed up.
Answers
What is the name of this unstable isotope from number 9?
Answers
Answer:
Xenon
Explanation:
Xenon is the unstable isotope element from number 9
You are asked to determine the identity of an unknown liquid and can only measure one physical property. You freeze the liquid and record that the liquid turns into a solid at 0 degrees C. Which physical property does this demonstrate?
melting point
boiling point
freezing point
volume
Answers
Part A
Describe the type of change in matter that occurred in thisinvestigation and provide evidence to support your response.
Part B
Describe a chemical property of baking soda.
Part C
Explain how the results of the investigation support the Law of Conservation of Matter.
Part D
Provide a brief explanation whythe investigation measurements differed.
Answers
Answer:
part b:
Sodium bicarbonate is a white, crystalline powder that sometimes forms lumps. It is odorless and has a bitter, salty taste. At room temperature, it is a solid. Solubility, or the ability of a substance to dissolve in water, is also a physical property. Sodium bicarbonate is soluble in water and can be separated from water through evaporation.
Explanation:
In the reaction of baking soda with acetic acid carbon dioxide gas is evolved that's why the balloon inflates. The mass in the product side and reactant side ar equal and the the total mass is conserved.
What is mass conservation?According law of conservation of mass, mass can neither be created nor be destroyed. Therefore, the total mass of a system will be conserved. In a chemical reaction, the total mass of reactants is equal to the total mass of products and thus no mass loss occur there.
In the reaction of vinegar (acetic acid) and sodium bicarbonate or baking soda, the mass on both side is equal and we get the product mass equal to the total mass of reactants if the experiment is carefully done.
Sodium carbonate is a colourless weak base, which can easily react with an acid and gets protonated. When sodium bicarbonate that is NaHCO₃, with vinegar CH₃COOH, it will produce carbon dioxide and water.
This carbon dioxide gas evolves to the balloon which is stretched on the top and the balloon will inflates.The measurements will differ at each moment because we are measuring it in different events of the reaction where the gas is evolving out.
To find more about baking soda, refer the link below:
https://brainly.com/question/17560232
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HELP!!!!!
Physical Models Activity
You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:
✔ Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
✔ Models must be created by you, not something selected from an online or outside source.
✔ Submit a presentation, picture, video, or screenshot of your model.
✔ Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.
Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.
Conservation of Mass
Atomic Theory
Thermal Energy
Answers
Answer:
Thermal Energy-Explore the effects of thermal energy. Model how adding or removing thermal energy affects motion in particles in a pure substance, such as water, or in a chemical reaction.
Explanation:
Answer: okay so!! I picked Atomic Energy, and i found some models- I'm not entirely sure what type of model this is supposed to be, so I found what i think it is. I hope I'm not late!!
Explanation:
Alright here's the description:Atomic optimism, from the History of Atomic Energy Collection.
so, i thought you could do a voice over (2:00 to 3:00 minutes long) of what you think the meaning of this is, or write a short summary of it.
(Of course you would have to crop this because,it wouldn't let me send it in cropped. I hope this helped!
heeeeeeeeeeeeeeeeeellllllllllllllllllllllllppppp
Answers
Answer:
Atomic number = 42
Chemical symbol = Mo
Number of protons = 42
Atomic mass = 96
Number of electrons = 42
Number of valence electrons = 1
number of electrons in n=3 shell = 8
Number of neutrons = 54
hope this helps :)
All of the following are forms of energy EXCEPT: A) heat B) friction C) light D) electrical
Answers
Answer:
Friction
Explanation:
Friction make heat energy its not a energy it self just a force
Answer:
Friction
Explanation:
Friction is only the resistance that one surface or object encounters when moving over another
HELPPPPPPPPP
HI PLSPLS
Answers
Which method of galaxy formation is expected to dominate far in the future?(1 point)
A) primordial collapse
B) merging
C) slow evolution
D) spreading
Answers
Answer:
its c) slow evolution
Explanation:
I took to qc
The atomic number of an element:
Question 2 options:
Tells you the mass of the atom
Tells you the number of energy levels there are around the atom
Tells you the identity of the atom
Tells you how many valence electrons the atom has
Answers
Buffalo, New York is a city located near a large lake called Lake Erie. Buffalo receives an average of nearly 94 inches of snowfall a year. Using your knowledge of temperature and what you have read, explain why Buffalo receives so much snow.
Answers
Answer: it is further away from the equator
Explanation:
The simple answer to why Buffalo receives so much snow, and why it is is often confined to a specific area, is lake effect snow. Lake effect snow occurs most frequently during cold snaps in early winter. It happens when the transfer of heat and moisture from the warm waters of the Great Lakes to the cold air creates a shallow layer of atmospheric instability, causing air to rise quickly. As the moisture rises and condenses, it begins to fall as snow–and often, a lot of snow. Depending on which direction the winds are blowing, areas in the snow belts near the Great Lakes (including Buffalo) can see several feet of snow in just a few days. According to the National Weather Service, in the Buffalo area, when cold air from Canada moves over the still unfrozen, relatively warm Great Lakes, the lake moisture and instability from this temperature contrast build one or more bands of snow. These bands are then deposited over locations downwind from the lakes, with some areas receiving much more snow than others, depending on their location and the wind direction.
“name each season from the diagram above.” PLEASE HELP I WASNT AT SCHOOL.
Answers
Answer:
to be honest I don't know
Explanation:
Answer:
A- Summer E- Winter
B- Spring F- Fall
C- Winter G- Summer
D- Autumn/Fall H- Spring
Explanation:
*WARNING* I don't know for a fact but i think this is the answer
PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE SCIENCE HELP PLEASE PLEASE HELP SCIENCE
Answers
Answer:
AAAAAAAAAAAAAAAAAAAAAAAAA
Answer:
A. 1.67×10^-24
Explanation:
Use the information and data from the tests to make a recommendation for which blanket the government should choose. In your response include scientific reasoning to support your recommendation.
Reasoning: Explain using scientific principles and connect the test results to the criteria and constraints.
Answers
Answer:
through the day yesterday and I was really hoping to see you and
How large is a typical animal or plant cell? A. 1-100 millimeters B. 1 meter C. 10-100 nanometers D. 10-100 micrometers WILL MARK BRAINLEST Science
Answers
Answer:
10-100 micrometers
Explanation:
Which surface is most likely to create an echo?
a room with hard, flat walls
a room with hard, bumpy walls
a room covered in soft, wavy curtains
a room padded with soft, flat cushions
Answers
A room with hard, flat walls surface is most likely to create an echo. Hence option A is correct.
What is echo?Echo is defined as a recurrence of sound caused by sound waves being reflected off of a wall, mountain, or other obstruction. Bats, dolphins, and fishermen all use echoes to find objects or obstructions. To find an obstruction, they are also utilized in SONAR (Sound navigation and ranging) and RADAR (Radio detection and ranging).
Buildings made of glass, metal, and concrete, the brick and metal interior of a warehouse, marble floors and buildings, or, if the room is designed in such a way that the acoustics produce an echo, plastered and painted interior walls, are examples of man-made materials that are smooth enough to produce an echo.
Thus, a room with hard, flat walls surface is most likely to create an echo. Hence option A is correct.
To learn more about echo, refer to the link below:
https://brainly.com/question/9527413
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What is the best description of how heat is transferred from deep in the earth to the surface?
a. Conduction brings hot magma up through the mantle toward the crust, where it cools and sinks.
b. Convection brings hot magma up through the mantle toward the crust, where it cools and sinks.
c. Convection brings hot magma up from the core to the crust, where it cools and sinks.
d. Conduction brings hot magma up from the core to the crust, where it cools and sinks.
Answers
Answer:
pretty sure it's C,
Explanation:
Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. ... This hot added material cools down by conduction and convection of heat.
When this candle is burned it seems to disappear over a period of time. In actuality, the candle is being converted to smoke,ash, and carbon dioxide, and the energy is being released as heat and light. This is an example of _____________.
A. Murphy's law
B. the law of conservation of mass
C. the law of chemical reactions
D. the law of nature
Answers
when enough stress builds up in brittle rock, the rock breaks, causing a ___ to form
Answers
How do faults form? When enough stress builds up in rock then the rock breaks creating a fault. A normal fault occurs when rock is being pulled apart by tension; in this type of fault the hanging wall moves downward and the foot wall moves upward due to the tension in Earth's crust.
The forces exerted on an object are shown.
help asap!!!!! (i will mark brainliest)
A box has an arrow pointing down labeled F and an arrow pointing up labeled 5 N.
Which of the following happens when F is less than 5 N?
The object moves up.
The object moves down.
Balanced forces keep the object stationary.
Balanced forces keep the object's speed constant.
Answers
Answer:
The object moves up.
Explanation:
I think that's the answer because since F was up that would cause 5 N . To go up.
Tell me if I'm wrong, plz :D
Answer:
The object moves up
Identify the form of energy.
mechanical energy
chemical energy
radiant energy
electrical energy
Answers
Answer:
Mechanical energy
Explanation:
Your body is doing most of the work
Explanation: The man’s leg is pushing down on the peddles (mechanical energy means to put something else in motion)
help me fastttttttttttt
Answers
Answer:
True is my answer
#Carry on learning#:)
Answer:
True
Explanation:
Bc u said it already the answer