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.
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
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.
In a chemical reaction, __________ are the substances present after the reaction.
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 with this.
Answer: It's C
Explanation: All of the other reaction are physical reaction.
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
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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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 .
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:
Identify and define the SI unit for force.
Answer: The SI unit of force is the newton, symbol N.
Explanation:
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.
An element is a ________ substance
A. Mixed
B. Pure
C. Combined
D. Human-made
Answer:
b, pure.
Explanation:
an element is a pure substance and it cannot be broken down hope this helped :)
Answer:
An element is a pure substance made up of identical atoms.
Explanation:
hope it helps
and brainliest if helped......
what is one way water moves through the nonliving parts of an ecosystem during the water system?
Answer:
Water moves through the help of living organisms in an ecosystem. ... Plants absorbs water through their root system and loss by transpiration. Water also moves through the living organisms in an ecosystem. Other nonliving processes such as evaporation, precipitation, water returns back into the atmosphere.
Explanation:
hope this helps you
evaporation!
Explanation: i know im late but i hope this helps other people aswell! <3
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
What is a wet celled battery composed of? Give an example of a wet celled battery.
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:
What is force?????????
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!
THIS IS A REPOST I WILL STILL GIVE BRAINLIEST FOR ALL ANSWERED QUESTIONS
Directions: Identify the manipulated variable and responding variable for each hypothesis.
HINT: If (fill in manipulated variable), then (fill in responding variable)
1. If plants are watered, then growth height will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
2. If chocolate is given to teachers, then amount of homework will decrease.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
3. If trees have leaves, then bird nests will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
4. If acid rain is in water, then fish population will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
5. If calcium is given, then bone strength will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
1. Manipulated: Water
Responding: Growth Height
2. Manipulated: Chocolate Given
Responding: Amount of Homework
3. Manipulated: Trees with Leaves
Responding: Number of Bird Nests
4. Manipulated: Acid Rain
Responding: Fish Population
5. Manipulated: Calcium Given
Responding: Bone Strength
Think about the manipulated variable as the changing item in the experiment. If this changes, the response will. (This is the Independent Variable)
Think of the Responding Variable as the result of the variable only can change when Manipulated is changed. (This is the Dependent Variable)
Hope This Helps :)
Manipulated variable in each case are watering of plants, number of chocolates, trees having leaves,water in acid rain, amount of calcium respectively and responding variables are growth height, amount of homework,number of bird nests,fish population,bone strength.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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Need help please With this.
Answer:question 3:(W)
question 4:(c)
Source:trust me bro
anybody wanna help?????
Answer:
straight line down then left and right that should be it
Explanation:
The medulla _____.
interprets signals from the sense organs
controls heartbeat and breathing
controls balance and digestion
coordinates muscle movement
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.
Answer:
ITS C
Explanation:
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?
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
The normal force acts _____ to the surface the object is sitting on.
at a 75-degree angle
perpendicular
parallel
at a 45-degree angle
Answer:
Its perpendicular did the exam :)
Explanation:
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)
The Newton is the SI unit for ____.
temperature
density
weight
mass
Answer:
Mass
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
HELP PLEASE ON MY FINAL
Grass
Rabbit
Fox
Mushroom
Which of the above organisms gets its energy from photosynthesis?
Only I
Only IV
I, II and III only
I, II, III and IV
Answer:
grass
Explanation:
it is a plant, hope this helps
Answer:
Only I
Explanation:
rabbits and foxes are not plants so it does not go through photosynthesis (they eat food to get their energy instead) . A mushroom is a decomomposer that breaks things down to get it's energy thus make the grass the only plant that goes through photosynthesis.
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
Answer:
c
Explanation:
Need help please With this.
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:
Need help please With this.
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)
Which of the following would not be a compound?
A. C6H12O6
B. (SO)4
C. H2O
D. Cl3
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.
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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?
What element is represented by this diagram?
Answer:
Beryllium
Explanation:
It is the element with 4 protons 5 neutrons an 2 outer electrons