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Related Questions
(7th grade chemistry) What makes a polyester, nylon and acrylic a synthetic materials/ products, in other words what happen during polyester, nylon and acrylic chemical reaction?(or what happen during a chemical reaction)
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Explanation:
What you call polyester is technically polyethylene terephthalate or PET plastic molded into filaments that are then woven into fabric. It's made in a chemical reaction between ethylene glycol and therephthalic acid, and these chemicals are derived from fossil fuels, air, and water.
Nylons are condensation polymers or copolymers, formed by reacting difunctional monomers containing equal parts of amine and carboxylic acid, so that amides are formed at both ends of each monomer in a process analogous to polypeptide biopolymers. Most nylons are made from the reaction of a dicarboxylic acid with a diamine or a lactam or amino acid with itself
The binder resin in acrylic paint is man-made, most of the time in some sort of lab. It is made generally from the monomer methyl methacrylate and also any real common catalyst. The catalyst speeds up the reaction to where the monomers create extremely long chains. Which result in polymethyl methacrylate, an acrylic plastic polymer.
The pigments are also mostly made in labs/factories. Most of the time they are either pure elements like pure cobalt powder and carbon charcoal, or they basic bounded compounds like cadmium sulfide. To make cadmium sulfide you react cadmium chloride with hydrogen sulfide to make a bright yellow solid. It is then washed and heated to make a spectrum of different colors.
Basically all of acrylic paints are man-made through various chemical reactions.
What is the correct equation to determine pressure?
Pressure = Force + Area
Pressure = Force - Area
Pressure = Force / Area
Pressure = Force * Area
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Hope this helps :)
1. What is one major pattern in the fossil record?
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Fossils give us information about how animals and plants lived in the past. ... Some animals and plant are only known to us as fossils. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other.
The fossil record is the highly ordered sequence in which fossils are found in layers of sedimentary rock.
Which of the following organisms evolved after amphibians?
Only cats
Only reptiles
Only marsupials and cats
Reptiles, marsupials, dogs, and cats
Answers
Answer:
Reptiles, marsupials, dogs, and cats
Explanation:
The correct answer is only reptiles as they evolved after amphibians.
Amphibians were one of the earliest groups of land-dwelling vertebrates to evolve. After amphibians, reptiles emerged. Reptiles are a diverse group of cold-blooded vertebrates that includes animals such as lizards, snakes, turtles, and crocodiles. They have adapted to a wide range of environments, including deserts, forests, and oceans.
The other options provided in the question, such as cats, marsupials, and dogs, did not evolve after amphibians. Cats and dogs belong to the mammal group, which evolved much later than amphibians. Marsupials, on the other hand, are a group of mammals that includes animals like kangaroos and koalas. While marsupials did evolve after amphibians, the question specifically asks for organisms that evolved "after amphibians," excluding any other groups that may have evolved concurrently.
So, the correct answer is "Only reptiles" because reptiles evolved after amphibians.
Learn more about amphibians,here:
https://brainly.com/question/31785803
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How is biodiversity related to niches?
Responses
A. In an ecosystem, the niche is how an organism makes its living.
B. Biodiversity is required to support keystone species' niche.
C. The more niches in an ecosystem, the greater the biodiversity.
D. The fewer niches in an ecosystem, the greater the genetic diversity within a species.
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Answer:
C. The more niches in an ecosystem, the greater the biodiversity.
Explanation:
HELP PLEASEEEEEEEEEEEEEEEEEEEEEE
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Question 22 :19 inches
question 22-19 inches
HELP PLEASE!
The picture below shows a 24-hour weather map for Texas.
What does the map indicate the weather will be for Alex's city?
A. Stormy weather caused by a warm front.
B. Clear weather caused by a high-pressure front.
C. Clear weather caused by a cold front.
D. Stormy weather caused by a high-pressure front.
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Answer:
C
Explanation:
Based on the "Heating Curve for Wax" what is the melting point of the wax?
250°C
0°C
50°C
150°C
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Where is the most common place thought of for transformational boundaries?
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The diagram below shows the branching tree diagram for cats.
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits, Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled from the from left to right as Amphibians, Reptiles, Marsupials, Dogs, Cats.
Which shared derived characteristic do reptiles, marsupials, and dogs have?
Amniotic egg
Fur
Retractable claws
Shearing teeth
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explanation : i learned this recently
Answer:
Shearing Teeth
Explanation:
Please help !! Science !!
just tell me in your answer what each one is !
thanks !
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Answer: PUMPKIN
Explanation:
Which best explains how rotation affects the colors we see in the sky at dawn and dusk?
A. At dawn and dusk the rotation of Earth slows down so the light from the increased sunlight creates colors.
B. At dawn and dusk, Earth has rotated closer to the Sun, so the heat creates the colors in the sky.
C. At dawn and dusk, sunlight is closer to Earth’s curved surface, refracting in the atmosphere, creating colors.
D. As dawn and dusk, the light from the Sun is fading and phases through all the colors of a prism in a cycle.
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Option (c) best describes about the rotation that, how it affects the colors we see in the sky at dawn and dusk.
What is dawn and dusk?'Dawn' is the early morning time or sunrise time and 'Dusk' is the twilight time or sunset time.
When earth is rotating at its own place, so at the dawn and dusk time sun is near to the horizon line and distance between the earths surface and sun is less as compared to the day time. And at that time red light travels much easily to the earth side due to long wavelength and blue color travels at the day time when distance is more. Due to scattering and refraction of light we are able to see colors.
Hence, at dawn and dusk, sunlight is closer to Earth’s curved surface, refracting in the atmosphere, creating colors.
To learn more about dawn and dusk light effect, visit below link:
https://brainly.com/question/10728818
PLSSsss HELP ASAP :)
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Answer:
Travis categorized their characteristics correctly.
Explanation: This is because plants use chloroplast in their cells to help them with photosynthesis, and this is what turns them green. Animals do not make their own food so they have no use for chloroplast in their cells.
Answer:
Travis is correct
Explanation:
Photosynthesis takes part in Chloroplast
**URGENT< WILL MARK BRAINLEST****What is true when a reaction reaches equilibrium? Select all that apply. *
There is more product than reactant.
The reaction has stopped.
The reaction is faster in the forward direction.
The reaction is faster in the backward direction.
The concentration of products and reactants is constant.
There is more reactant than product.
The reaction rate is equal in both directions.
Answers
Answer:
below
Explanation:
The reaction rate is equal in both directions.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time.
Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products, the amount of reactants and products present is constant.
For example, balanced chemical reaction: N₂(g) + O₂(g) ⇄ 2NO(g).
Which shared derived characteristic do reptiles, marsupials, and dogs have?
Amniotic egg
Fur
Retractable claws
Shearing teeth
Answers
Answer:
Shearing teeth
Explanation:
Just use process of elimination. Dogs don't lay eggs, reptiles don't have fur, neither of them have retractable claws, so the only one left is shearing teeth.
A natural resource that is not replaced by nature in a useful time frame.
A. non-renewable resource
B. natural resource
C. renewable resource
D. conservation
(For science)
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How is precambrian time different from other divisions of the geologic time scale?
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Precambrian time is different from other divisions of the geologic time scale as the life forms in this time had soft bodies.
What are geologic time?Geologic time is the time that is begins at the start of the Archean eon and it is the extensive interval of time occupied by the geologic history of the earth.
Precambrian time is the the earliest time of the geologic ages, which are marked by different layers of sedimentary rock including the fossilized remains of plants and animals buried when the sediments were formed. Main difference between both the times is in Precambrian time life-forms had soft body parts and in Geologic time life-forms had hard body parts.
Hence main difference is of life forms.
To know more about geologic time, visit the link:
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The boiling point of a substance will be the same temperature as its
melting point
condensation point
freezing point
sublimation point
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Answer:
condensation point
Explanation:
boiling point is the temperature that a liquid turns to gas,
condensation is the point a gas turns to liquid
(sorry if i’m wrong)
Which solid is most dense? ______________________________
Which liquid is least dense? ______________________________
Which solid is about as dense as dish soap? ______________________________
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Answer:
bolt
lamp oil
cherry tomato
plzzzzzzz help meeeeeeee
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Answer:
because one is going into your mouth and the other you feel with your hand.
Explanation:
idek
PLEASE HELP!
The diagram below represents geographical features found in the ocean.
What symbolizes a rift valley?
A. 2
B. 3
C. 4
D. 5
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Answer:
The answer is C, number 4 shows a rift valley
Explanation: This is because the shape of the feature is literally a rift and it forms a valley lol. Also i have some evidence:
I really need help with this Im lost
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What is the significance of the water in the oceanic crust and subduction?
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Answer:
Oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries.
Explanation:
How are weathering and erosion different? Choose the best statement.
A. Weathering is the movement of rock and erosion is when the rock remains in the same place.
B. Weathering causes rocks to break down and erosion is when the rocks are carried from one place to another.
C. Erosion occurs over a longer period of time and weathering occurs over a shorter period of time.
D. Weathering is caused by wind, water, and other rocks but erosion is caused only by wind.
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5.
Which statement accurately describes the atoms of a specific element?
a.)A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.
b.)A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.
c.)An indium‚ In‚ atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus.
d.)An aluminum‚ Al‚ atom contains 27 electrons and 27 protons inside the nucleus.
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Which type of rock is MOST LIKELY to form because of high heat pressure
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Answer:
Metamorhpic rock
Explanation:
Answer:
Metamorphic RocksThis formula shows the chemical reaction that occurs when the body breaks down sugar. The products are carbon dioxide and water.
How many carbon atoms are needed in this reaction?
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Answer:
i like nuggs
Explanation:
What procedure did you use to complete the lab? weather patterns
Outline the steps of the procedure in full sentences.
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Answer:
yeah
Explanation:
4. If you could repeat the lab and make it better, what would you do differently and why?
There are always ways that labs can be improved. Now that you are a veteran of this lab and have experience with the procedure, offer some advice to the next scientist about what you suggest and why. Your answer should be at least two to three sentences in length.
What kind of value does biodiversity have within an ecosystem?
Responses
A. Ecological value
B. Recreational value
C. Economic value
D. All of the other answer choices
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Answer:
A. Ecological value
Explanation:
Can someone help quick
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Answer:
Sodium
(Na)
Just count the electrons and search which atom it is.