Answers
A 15
DONE.........................
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PLZ HELP IM FAILING SCIENCE
Scientists hope to use aerogels to aid in oil spill cleaning process by floating aerogels on water where oil has been spilled. For this to occur how would the density of aerogels compare to the density of seawater? a a. The mass of aerogels must be larger. b b. The volume and mass of aerogels must be larger c c. For the same mass, the aerogel must take up less space. d d. For the same volume, the aerogel must have a smaller mass.
I WILL GIVE BRAINLIEST
Answers
Answer:
Cleaning up oil spills and metal contaminates in a low-impact, sustainable and inexpensive manner remains a challenge for companies and governments globally.
But a group of researchers at UW–Madison is examining alternative materials that can be modified to absorb oil and chemicals. If further developed, the technology may offer a cheaper and “greener” method to absorb oil and heavy metals from water and other surfaces.
Aerogels, which are highly porous materials and the lightest solids in existence, are already used in a variety of applications, ranging from insulation and aerospace materials to thickening agents in paints. The aerogel prepared in Gong’s lab is made of cellulose nanofibrils (sustainable wood-based materials) and an environmentally friendly polymer. Furthermore, these cellulose-based aerogels are made using an environmentally friendly freeze-drying process without the use of organic solvents.
It’s the combination of this “greener"material and its high performance that got Gong’s attention.
“For this material, one unique property is that it has superior absorbing ability for organic solvents — up to nearly 100 times its own weight,” she says. “It also has strong absorbing ability for metal ions.”
Treating the cellulose-based aerogel with specific types of silane after it is made through the freeze-drying process is a key step that gives the aerogel its water-repelling and oil-absorbing properties.
What is a wet celled battery composed of? Give an example of a wet celled battery.
Answers
Answer:
A wet-cell battery is the original type of rechargeable battery.
An example of a wet cell battery is a lead-acid battery.
Explanation:
Red blood cells need iron. They store iron and typically contain more iron than the fluid around them does. Which action would show the blood cells doing active transport?
pushing iron out
bringing iron in
swelling
shrinking
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Need help please With this.
Answers
Answer:question 3:(W)
question 4:(c)
Source:trust me bro
4:c for they are 3 carbons in the diagram and 8 hydrogens making it a hydrocarbon C3H8
Lucia is given a picture of several cells. Her task is to identify the cells as plant or animal
cells. How can she pinpoint the cells that are plant cells?
A. She should look for a cell membrane surrounding the cell.
B. She should look for cytoplasm that is filled with organelles.
C. She should look for a large nucleus in the center of the cells.
D. She should look for ovals full of green dots called chloroplasts
Answers
Plant cells have a cell wall, animal cells do not.
Answer:
D She should look for ovals full of green dots called chloroplasts
Explanation:
Plant cells are the only cells that will have chloroplast as it helps the plant go through photosynthesis.
Are these cells like the single-celled organisms? We use the same word for the cells in your heart as for a single-celled organism like the bacteria you saw. Both are called cells. Are there any differences?
Answers
Answer:
One you can see with the naked eye and the other you can not.
Explanation:
When your are talking about single celled organisms you can see the cells like bacteria. When you talk about non singled celled organisms you can see that organism.
Answer:
One you can see with the naked eye and the other you can not.
Explanation:
when you are talking about single celled organism you can see the cells like bacteria when you talk about non singled cell organism you can see that organism
Anne applies a force on a toy car and makes it move forward. What can be said about the forces acting on the toy car at the moment Anne applies the force?
Answers
The medulla _____.
interprets signals from the sense organs
controls heartbeat and breathing
controls balance and digestion
coordinates muscle movement
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The first person to answer this question CORRECTLY will get a BRAINLEST
A plant stands upright after being watered. This is an example of:
A) geotropism
B) a decrease in turgor pressure
C) phototropism
D) an increase in turgor pressure
Answers
Answer:
A) geotropism
Explanation:
I hope this helps!
Please give me brainliest!
:}
Answer:
Im pretty sure its d
Explanation:
Im srry if its wrong but I hope this helped and have a great day!
Identify the type of heat transfer that occurs in each illustration (conduction, convection, radiation) and provide a 1-2 sentence explanation of how you know. (6th Grade)
Answers
Convection
Radiation
Identify and define the SI unit for force.
Answers
Answer: The SI unit of force is the newton, symbol N.
Explanation:
The normal force acts _____ to the surface the object is sitting on.
at a 75-degree angle
perpendicular
parallel
at a 45-degree angle
Answers
Answer:
Its perpendicular did the exam :)
Explanation:
PLEASE HELP ME ASAP THIS IS DUE IN 10 MINUTES AND I AM STUCK!!
For an investigation, a student records data about four unknown substances.
Picture 1: In comments...
The student then calculates the densities of the unknown substances and compares them with the table of densities of known substances shown below.
Picture 2: In comments
Which unknown substance is most likely carbon?
A. Substance 1
B. Substance 2
C. Substance 3
D. Substance 4
Answers
Answer:
c
Explanation:
What occurs in a chemical reaction?
Answers
Answer: A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Explanation:
Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Explanation:
Brainliest please?
In a chemical reaction, __________ are the substances present after the reaction.
Answers
Answer:
products
Explanation:
Explanation: Substances present BEFORE a reaction occurs are described as reactants. Substances present AFTER a reaction has occurred are described as products.
Need help please With this.
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DUDE- HOW IS THAT MIDDLE SCHOOL
Answer:
The volume of the sample is equal to the other sample's volume / 2 times 9 to the 14th power so that would be about 369.47 grams
Explanation:
What is force?????????
Answers
Answer:
a. s s
Explanation:
thats the bottom line cut stone cold said so
Answer:
Force is a push or pull upon an object from the object's interaction with another object.
Explanation:
Whenever there is an interaction between two objects, there is a force upon each of the objects.
Hope this helps and have a great day!
Explain The energy transformations that takes place as a skateboard coasting on a flat surface slows down and comes to a stop.
Answers
Answer:
Friction in the wheels transforms kinetic energy into thermal energy.
Explanation:
A pitcher throws a softball toward home plate. When the ball hits the catcher’s mitt, its horizontal velocity is 32 meters/second. The softball’s velocity goes to 0 meters/second in 0.8 seconds when caught. If the softball has a mass of 0.2 kilograms, what’s the force of the impact? Use F = ma, where .
Answers
Answer:
To calculate the force of impact F, first lets calculate the acceleration a of the ball:
a=v/t where v is the velocity of the ball and t is time
a=32/0.8=40 m/s²
To get the force F we need the Newtons second law:
F=m*a where m is the mass of the ball and a is the acceleration.
F=m*a= 0.2*40 = 8 N
So the impact force is F= 8 N.
Explanation:
What element is represented by this diagram?
Answers
Answer:
Beryllium
Explanation:
It is the element with 4 protons 5 neutrons an 2 outer electrons
fact check this please
Ceres is a rocky celestial body located in the main asteroid belt. It has a nearly spherical shape and orbits the Sun. There are several asteroids in its orbit. Based on this information, which type of body is Ceres?
A.
asteroid
B.
dwarf planet
C.
meteor
D.
planet ( I put A as the awnser)
Answers
Need help with this.
Answers
Answer: It's C
Explanation: All of the other reaction are physical reaction.
Can someone please answer these 2 for me :)) I WILL GIVE BRAINLISTTTTT
Answers
gold is the piece of metal which have larger mass.
Explanation:
because it is reactive in nature than copper
Because gold has a greater density than copper therefore 1 cm3 of gold is equal to a mass of 19.3 g while 1 cm3 of copper is 8.9 g
Compare the chemical reaction that causes the Statue of Liberty to look green with the chemical reaction that causes a bike to rust.
Answers
Bike rust - Is do to being exposed to moisture ( like Water, or any type or liquid.)
Hope this helps!!
Both the situations are examples of corrosion. The green colour seen in statue of Liberty is due to the copper oxide formation whereas the resulting in bike parts is due to the formation of iron oxide in the surface.
What is corrosion?Corrosion is a chemical process by which the metals are destroying and change in colour. Metal surface when open to air or water will react with the oxygen forms corresponding oxides.
Corrosion is an electrochemical process where the oxygen acts as the anode and the metal surface cathode where the oxide deposits and the colour changes. Materials containing iron will react with oxygen forms a red iron oxide called rust which then completely corrode the metal.
Similarly, the statues are made of metal alloys containing copper. Copper also reacts with air or water forms the copper oxide which is green in colour that is why the statues are turning to a gree patchy colour over time.
To find more about corrosion, refer the link below:
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The image shows particles of salt dissolved in water.
How will the arrangement of salt particles most likely change?
Salt particles will move toward the left through diffusion.
Salt particles will move toward the left through active transport.
Salt particles will move toward the right through diffusion.
Salt particles will move toward the right through active transport.
Answers
Answer:
ITS C
Explanation:
During a phase change, thermal energy is changing and temperature is _______
also changing
staying constant
increasing
decreasing
Answers
Answer:
Decreasing
Explanation:
A phase change is occuring; the liquid water is changing to gaseous water, or steam. On a molecular level, the intermolecular forces between the water molecules are decreasing. The heat is providing enough energy for the water molecules to overcome these attractive forces.
The function of a cell wall is:
A. A thick rigid structure that surrounds the cell membrane in plants.
B. A thin outer covering found in plants and animal cells. It controls what enters and leaves the cell.
C. The liquid part of the cell where all the organelles are suspended. It also contains nutrients cell waste and water.
D. An organelle found in cells that stores water and nutrients for cells.
Answers
Min was writing about changes in the state of matter for a research paper. Which of these changes might she include as examples of sublimation?
Choose the two statements that apply.
A. Clothing is hung outside on a day when the temperature is below the freezing point of water. The clothes dry, even though they freeze first.
B. An ice cube melts on the floor, then it evaporates.
C. Bromine is a reddish brown, liquid element. In a closed container, a reddish brown gas exists above the surface of the bromine.
D. Dry ice changes directly to carbon dioxide gas
Answers
Sublimation is the process by which solids are instantly transformed into gases. The forces of attraction between solids are completely defeated when they absorb enough energy. Solids, such as dry ice, undergo sublimation.
What is sublimation?Similar to melting, freezing, and evaporation, sublimation is a form of phase transition, or change in a state of matter. Without ever entering a liquid phase, a substance transforms from a solid to a gas through sublimation. Typical sublimation examples include dry ice, which is solid CO2,additional elements that cannot be sublimated. A solid-solid combination is separated by sublimation when one of the components sublimes (transforms from solid to gaseous state without producing liquid) following heating, leaving the other non- sublimable components behind.Sublimation is the direct transition of a substance from the solid phase to the gas phase without passing through the liquid phase in between. Sublimation is an endothermic phase transition that occurs at temperatures and pressures lower than a chemical's triple point in the phase diagram.To learn more about Sublimation refer to:
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Which of the following would not be a compound?
A. C6H12O6
B. (SO)4
C. H2O
D. Cl3
Answers
Answer:
[tex]cl3[/tex]
Explanation:
[tex]cl3 \: is \: an \: anion \: of \: chlorine \\ hope \: it \: helps \\ and \: pls \: mark \: as \: brainliest[/tex]
Compounds are formed by the combination of atoms of two or more different elements in a fixed ratio to each other. Therefore, Cl3 not a compound. Hence, option D is the correct answer.
Matter can be divided into two categories. Elements and compounds. An element contains particles of only one type which may be atoms or molecules. The compounds contain particles of two or more elements. Some main characteristics of compounds are,
• Homogenous
• Definite melting and boiling points
• Combines in a fixed ratio
• Pure substance
Hence, we can conclude, compounds contain two or more different elements. Therefore, option D is the correct answer.
Learn more about compounds here:
https://brainly.in/question/9930309
Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temnperature spoon. Which substance will
have heat flow from it to the other substances?
O the milk
O the spoon
O the oatmeal
O the surrounding air