Answer:
Answer: Chemical change; Chemical property of heat of combustion
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Explanation:
Answer:
: Chemical change; Chemical property of heat of combustion
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Example: Melting of ice
Physical property is defined as the property of a substance which becomes evident during physical changes. Example: Melting point
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
Example: combustion
Chemical property is defined as the property of a substance which becomes evident during chemical changes. Example: Reactivity with other substances
Thus when a piece of coal and a piece of wood is burnt , there is formation of new substances and thus is a chemical change. Combustion is a chemical property as it is reactivity of a substance with oxygen.
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How are dwarf planets and major planets similar? (Choose all that apply)
They both travel through space in a path around the Sun.
They both have enough mass and gravity to be nearly round.
They both travel around the Sun at the same distance.
They both have other objects in their orbit.
Answer:
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Explanation:
Is a change in matter that produces one or more substances
Chemical change
Physical change
Chemical reaction
Answer:
Chemical change
Explanation:
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.
its not physical change: What is a physical change? A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.
its not chemical reaction: A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
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Which of the following is NOT a region of the Sun? a Deuterium nucleus b The core c The convective zone d The visible surface
Answer:
A Deterium nucleus
Explanation:
The answer option which is not a region of the Sun is: A. deuterium nucleus.
What is Sun?Sun can be defined as a medium-sized, main-sequence (yellow dwarf) star that is located at the center of the solar system and it supplies the heat energy and light that sustains life on planet Earth.
According to astronomical information and records, the Sun is marked to be the brightest, largest, and most massive celestial object within the solar system and it comprises the following regions:
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I need an example of Nuclear Chemistry.
Any suggestions...
Answer:
Nuclear fusion: reactions in which two or more elements "fuse" together to form one larger element, releasing energy in the process. A good example is the fusion of two "heavy" isotopes of hydrogen (deuterium: H2 and tritium: H3) into the element helium.
Explanation:
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Which statement describes how heat is transferred by radiation?
Air molecules touch the warm ground, heating them up.
Sunlight travels through space without the aid of fluids or solids.
Air at the equator rises and sinks at the poles.
Warm air rises and takes heat with it; eventually it cools and sinks.
Answer:
convection current waves
Explanation:
The study of chemicals is called chemistry.
The correct answer is D.
The heat convention is stated as the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction and advection.
According to the question, the warm air rises up and travels along with the air.
The hot air also has a high temperature due to which the radiation of the heat transfer from one place to another.
Hence, the correct answer is D that is Warm air rises and takes heat with it; eventually, it cools and sinks.
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Based on The Riddle of the Rosetta Stone, what influence did many people believe Thomas Young had on the findings of Jean-François Champollion?
Many people believed Champollion continued his research because of Young’s encouragement.
Many people believed Champollion learned everything he knew about hieroglyphs from Young.
Many people believed Champollion copied Young’s idea that hieroglyphs represented sounds.
Many people believed Young was the first to inspire Champollion to decipher the writings on the Rosetta Stone.
Answer:B. 0.72 AU
Explanation:
Answer:
it is C
Explanation:
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Answer:
I don't know that sO Sis I CanT reAlly hElp yOu
Explanation:
SoRy
How would you compare Uranus (a Jovian planet) to Earth (a terrestrial planet)?
Earth is larger than Uranus.
Uranus is larger than Earth.
They are the same size.
Describe the function of organelle X and explain how it is important to the survival of the cell. In your answer, be sure to:
By which mechanism does older oceanic rock move at a ridge?
A) New molten material rises and moves the rock
B) The ridge subducts and moves the rock
C) Continents drift and move the rock.
D) Magnetic forces move the rock.
Answer:
A) New molten material rises and moves the rock
Explanation:
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon. Rosa is breathing normally. does she need from the food she ate and the air she breathes so that she can go on her run? (Sentence starter: The molecules Rosa needs from the food she eats and air she breathes are.
this science
Explanation:
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Rosa plans to go for a run later this afternoon. Rosa is breathing normally. does she need from the food she ate and the air she breathes so that she can go on her run? (Sentence starter: The molecules Rosa needs from the food she eats and air she breathes are.
this science
The amount of water vapor in a given volume of air is ______________ .The amount of water vapor in the air at any one time depends on ______________ . Warmer air holds ______________ water thancooler air. Clouds form when humidity is ______________ and thetemperature is ______________ . ______________ humidity is definedas the amount of water vapor in the air ______________ by the amountthat would have to be present in the same air to form a ______________ or condense on a surface. ______________ is related to the humidityof the previous day. The air temperature at which water vapor in the air ______________ onto cool surfaces is the dew point.
The words:
humidity
temperature
more
high
low
relative
divided
cloud
dew
condenses
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Answer:
The amount of water vapor in a given volume of air is humidity.The amount of water vapor in the air at any one time depends on temperature . Warmer air holds more water than cooler air. Clouds form when humidity is low and thetemperature is high . Relative humidity is defined as the amount of water vapor in the air divided by the amount that would have to be present in the same air to form a cloud or condense on a surface. Dew is related to the humidity of the previous day. The air temperature at which water vapor in the air condenses onto cool surfaces is the dew point.
Explanation:
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Answer: 414,000 is the answer
Explanation: My name is Armalinda lets be friends
How would you describe a dwarf planet?
It is too big to be a planet, but too small to be an asteroid, meteor, or other space object.
It is too small to be a planet, and too small to be an asteroid, meteor, or other space object.
It is too small to be a planet, but too big to be an asteroid, meteor, or other space object.
It is too big to be a planet, and too big to be an asteroid, meteor, or other space object.
Answer:
c
Explanation:
What are the characteristics of Mercury? (Select all that apply.)
Mercury has less gravity than the Earth.
Mercury has many rings visible from Earth.
Mercury’s year is similar to that of Earth.
Mercury is the closest planet to the Sun.
Answer:
less gravity, closest to the sun
Answer:
Mercury has less gravity than the earth, mercury is the closest planet to the sun. I hope this helps.
Explanation:
What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table
Answer:
large atoms
Explanation:
its kinda obvious
Answer:
large atoms (B)
Explanation:
Which of the following equations demonstrates the law of conservation of mass?
Mg + O2 ---> MgO
Ca + F2 --> CaF
Li + N3 --> Li3N
4Na + O2 ---> 2Na2O
Answer:
Mg + O2 ---> MgO
Explanation: V2O5 + CaS → CaO + V2S5. 5V2O5 + 5CaS → 10CaO + 5V2S5. 3V2O5 + 3CaS → 3CaO + 3V2S5.
Measuring Physical Properties Lab Report
Instructions: In the Physical Properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in Tiny World. Record your observations and test measurements in the lab report below. You will submit your completed report.
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objective(s):
In your own words, what was the purpose of this lab?
Hypothesis:
In this section, include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome.
Using the summary questions, clearly define the dependent and independent variables of the experiment.
Data:
Record the results of each of your physical property tests in the table below.
Wood Clay Brick Iron Aluminum Copper Nickel
Flexibility
(?/10)
Magnetism
(number of paper clips)
Thermal Conductivity
(W/(m·K))
Electrical Conductivity
(x107 S/m)
Density
(g/cm3)
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
What building material did you use to build your house? Did your results support or fail to support your hypotheses?
What were the densities of the materials you chose for the walls and floor for the home in Tiny World? Why do you think a building material's density is important when building homes or architectural structures?
Why wouldn’t you choose wood or aluminum for the latches on your house?
Which material has the highest thermal conductivity? Which material has the highest electrical conductivity? Explain why thermal and electrical conductivity is so high with this material.
Think about where you live now or where you have lived in the past; use complete sentences to describe this environment and the weather. What building materials do you believe would work well to build a home in that area? Explain why you chose these materials.
Answer:
Wood Clay Brick Iron Aluminum Copper Nickel
Flexibility
(?/10) 3/10 2/10 4/10 7/10 6/10 5/10
Magnetism
(number of paper clips) 0 1 10 0 0 7
Thermal Conductivity
(W/(m·K)) 0.12 0.6 80 2.35 4.00 91
Electrical
(x107 S/m) 0 0 1 3.8 5.9 1.4
Density
(g/cm3) 0.64 2.04 8.83 2.46 8.62 8.40
Explanation:
Which statement best compares segmented worms and roundworms?
Some segmented worms have setae, but roundworms do not.
Some roundworms have setae, but segmented worms do not.
Segmented worms have sense organs, but roundworms do not.
Roundworms have sense organs, but segmented worms do not.
The statement which best compares segmented worms and roundworms is that some segmented worms have setae, but roundworms do not.
What are roundworms?Roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments. Less formally, they are categorized as helminths, but are taxonomically classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa, and unlike flatworms, have tubular digestive systems with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum.
Nematodes species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species described to date vary by author and may change rapidly over time. A 2013 survey of animal biodiversity published in the mega journal Zootaxa puts this figure at over 25,000. Estimates of the total number of extant species are subject to even greater variation.
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Why does Mercury have almost no atmosphere?
Mercury spins on its axis too fast to have an atmosphere.
Radiation from the Sun blows the atmospheric particles off into space.
Mercury's gravity is too weak to hold an atmosphere.
Mercury orbits the Sun at such high speed that the atmosphere is blown away.
Answer:
There are two main reasons. First, Mercury is small and doesn't have much gravity so it's hard to hold onto an atmosphere. Second, Mercury is close to the Sun so any atmosphere gets blasted away by stuff being blown off the Sun.
Explanation:
Because Mercury has no atmosphere, it can't hold onto its heat very well. The night side of Mercury gets very cold, which brings down the average temperature of the planet and makes it only the second hottest planet in the Solar System after Venus.
. Guillermo was finding it difficult to walk up the steps to his family’s apartment. His doctor thinks that his cells might not be getting enough oxygen or glucose. Which body systems should the doctor test in order to find out whether Guillermo’s cells are getting enough oxygen and glucose and why? (Sentence starter: The body systems Guillermo should have tested are .
Answer:
Because oxygen is the combustion fuel and glucose is the substrate needed for synthesis of energy as ATPs during cellular respiration.Therefore Guillermo lacks enough energy as ATPs in her body cells, especially skeletal muscles cells to complete the task of ascending the s steps.
For all the mitochondrial in cells(sites of energy production) to receive needed glucose,and other metabolites needed for energy synthesis; an efficient transport system is needed, so that these materials are available immediately, in required amount. This system is called circulatory system.
And for the the supply of combustion fuel (oxygen) needed for the completion of the ATP synthesis mechanisms; respiratory systems which convey oxygen from the external environments to the circulatory system through breathing mechanisms, for distribution is needed.
Thus the doctor needs to test both the circulatory and respiratory systems.
Explanation:
1.Which of the following has the fewest number of total atoms?Immersive Reader
(1 Point)
C₂H₆O
CH₃CH₂Br
C₄H₁₀O
2.In which of these compounds are there twice as many hydrogen atoms as oxygen atoms?
(1 Point)
H₂SO₄
HBrO₃
H₂O
3.How many oxygen atoms are there in the products of this equation?
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O
(1 Point)
36
18
8
13
4.Ammonium nitrate, NH₄NO₃ , is a chemical used to fertilize soil. How many total atoms are represented in this chemical formula?
(1 Point)
9
8
14
7
Answer:
1 A
2 C
3 B
4 C
Explanation:
What is a difference between a dwarf planet and a major planet?
Dwarf planets do not travel around the Sun.
Dwarf planets are much closer to the Sun.
Dwarf planets do not have enough mass and gravity to be nearly round.
Dwarf planets have not cleared other objects out of their orbital paths.
Why do chemical properties change?
What do the prefixes exo- and endo- mean?
What happens to heat in an exothermic reaction?
What happens to heat in an endothermic reaction?
PLEASE HELP WILL GIVE BRAINLIEST
Answer:
I think It's C.
Explanation:
George splits a bagel in half and places both sides of the bagel in a toaster. He turns on the toaster, and within a minute the bagel pops out, brown and evenly toasted. What type(s) of heat transfer toasted the bagel?
A. conduction
B. radiation
C. convection
D. conduction and convection
What do the elements within a "period" have in common? (pick one)
A. same number of electrons
B. similar chemical properties
C. equal number of electron orbits
D. equal atomic number
Answer:
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
Explanation:
The amount of water vapor in a given volume of air is ______________ .The amount of water vapor in the air at any one time depends on ______________ . Warmer air holds ______________ water thancooler air. Clouds form when humidity is ______________ and thetemperature is ______________ . ______________ humidity is definedas the amount of water vapor in the air ______________ by the amountthat would have to be present in the same air to form a ______________ or condense on a surface. ______________ is related to the humidityof the previous day. The air temperature at which water vapor in the air ______________ onto cool surfaces is the dew point.
word bank
humidity
temperature
more
high
low
relative
divided
cloud
dew
condenses
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My science teacher trying to be cool
Answer:
omg lol XD
Explanation:
What is a chemical change?
What are some examples of chemical changes?
What is the essential difference between a physical change and a chemical change?
Why do physical properties change?
Answer:
Burning of paper and log of wood.
Digestion of food.
Boiling an egg.
Chemical battery usage.
Electroplating a metal.
Baking a cake.
Milk going sour.
Various metabolic reactions that take place in the cells.
Explanation:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.