Answer:
Air is a mixture of approximately 80% nitrogen, 20% oxygen and a small amount of many other gases.
Explanation:
How much energy is required to completely melt a 250 gram ice cube that is already at 0 degrees Celsius? Show your work & units. Expected Answer = 83,500 J
Answer:
Q = 83500J
Explanation:
[tex]Q = L_{ice} *m[/tex]
[tex]L_{ice} = 3.34*10^{5} \frac{J}{kg}[/tex]
[tex]m = 250g = 0.25kg[/tex]
[tex]Q = (3.34*10^{5} \frac{J}{kg})*(0.25kg)[/tex]
[tex]Q = 83500J[/tex]
Can someone please answer these 2 for me :)) I WILL GIVE BRAINLISTTTTT
gold is the piece of metal which have larger mass.
Explanation:
because it is reactive in nature than copper
What type of reaction does the following equation represent?
FeS+2HCl→FeCl2+H2S
A. synthesis reaction
B. double-displacement reaction
C. single-displacement reaction
D. decomposition reaction
Answer:
B. double-replacement RXN
Explanation:
more specifically, this is a precipitation rxn.
What occurs in a chemical reaction?
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?
If you get this right, I'll teach you how to out pizza the hut :)
Answer:
Lightning rods (and the accompanying protection system) are designed to protect a house or building from a direct lightning strike and, in particular, a lightning-initiated fire, Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit, and An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.
Explanation:
Im smart
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A 15
DONE.........................
The diagram shows a food web in a grassland.
What best describes the role of the grasshopper in the food web?
Group of answer choices
A primary consumer that is food for the lizard and hawk
A secondary consumer that is food for the lizard and hawk
A primary consumer that is food for a single predator, the lizard
A secondary consumer that is food for a single predator, the lizard
Answer:
I think it is a sorry if i'm wrong
Explanation:
How much energy is required to completely vaporize 250 grams of liquid water that is already at 100 degrees Celsius? Show your work & units. Expected Answer = 565,000 J
Answer:
564100J (~ 565000J) of heat energy is required.
Explanation:
The enthalpy of vaporization of water is 2256.4J/g, meaning that 2256.4J of heat is required to convert 1 gram of water at 100 degrees Celcius to steam at 100 degrees Celcius.
In your case, we have 250g of water at 100C and we want to vaporize it to steam (also at 100C).
This requires ΔH = 2256.4(250) = 564100J of heat energy.
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
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!
What is used to measure the energy in a chemical reaction?
I'm pretty sure it's a calorimeter.
Answer:
calorimeter
Explanation:
calorimeter
A calorimeter is a device used to measure the amount of heat involved in a chemical or physical process. For example, when an exothermic reaction occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution, which increases its temperature.
Mia looked at a graph showing average global temperatures. She noticed that the average temperatures have risen abruptly over the past several decades. This indicates that global warming is occurring at a fast rate. What additional pieces of evidence do scientists use to support the idea that global warming is happening?
Question options:
the amount of greenhouse gases leaving the atmosphere and increases in amounts of sea ice
the greenhouse effect and reductions in sea levels
greenhouse gas concentrations, decreases in amounts of sea ice, and increases in sea levels
ocean temperature changes, greenhouse gases concentrations, and harmful emissions reductions
The idea of global warming is happening is supported by increasing greenhouse gases concentrations, decreases in amounts of sea ice, and increases in sea levels.
Global warming is purported to be due to the inability of reflected solar radiation to travel back to space as a result of greenhouse gases forming a layer of blanket over the atmosphere.
Thus, an increase in the concentration of greenhouse gases correlating with an increase in global temperature is one piece of evidence used to support the idea of global warming.
Also, it is logical that increased global temperature will lead to the melting of sea ice and the resulting water will cause a rise in the levels of seas. The existence of these phenomena reinforces the idea that global warming is actually a thing.
More on global warming can be found here: https://brainly.com/question/23569238?referrer=searchResults
what are the characteristics of the two systems of government in this region? Explain in detail.
Explanation:
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail. what are the characteristics of the two systems of government in this region? Explain in detail. what are the characteristics of the two systems of government in this region? Explain in detail. what are the characteristics of the two systems of government in this region? Explain in detail. what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
what are the characteristics of the two systems of government in this region? Explain in detail.
Answer:
space agency of the Republic of India, headquartered in Bengaluru. It operates under Department of Space (DoS) which is directly overseen by the prime minister of India while chairman of ISRO acts as executive of DoS as well. ISRO is the primary agency in India to perform tasks related to space based applications, space exploration and development of related technologies.[6] It is one of six government space agencies in the world which possess full launch capabilities, deploy cryogenic engines, launch extraterrestrial missions and operate large fleets of artificial satellites.[7][b]
The Indian National Committee for Space Research (INCOSPAR) was established by Jawaharlal Nehru[8] under the Department of Atomic Energy (DAE) in 1962, with the urging of scientist Vikram Sarabhai recognising the need in space research. INCOSPAR grew and became ISRO in 1969,[9] also under the DAE.[10][11] In 1972, the Government of India had set up a Space Commission and the Department of Space (DOS),[12] bringing ISRO under the DOS. The establishment of ISRO thus institutionalised space research activities in India.[13] It is managed by the DOS, which reports to the Prime Minister of India.[14]
ISRO built India's first satellite, Aryabhata, which was launched by the Soviet Union on 19 April 1975.[15] It was named after the mathematician Aryabhata. In 1980, Rohini became the first satellite to be placed in orbit by an Indian-made launch vehicle, SLV-3. ISRO subsequently developed two other rockets: the Polar Satellite Launch Vehicle (PSLV) for launching satellites into polar orbits and the Geosynchronous Satellite Launch Vehicle (GSLV) for placing satellites into geostationary orbits. These rockets have launched numerous communications satellites and Earth observation satellites. Satellite navigation systems like GAGAN and IRNSS have been deployed. In January 2014, ISRO used an indigenous cryogenic engine CE-7.5 in a GSLV-D5 launch of the GSAT-14.[16][17]
ISRO sent a lunar orbiter, Chandrayaan-1, on 22 October 2008, which discovered lunar water in the form of ice,[18] and the Mars Orbiter Mission, on 5 November 2013, which entered Mars orbit on 24 September 2014, making India the first nation to succeed on its maiden attempt to Mars, as well as the first space agency in Asia to reach Mars orbit.[19] On 18 June 2016, ISRO launched twenty satellites in a single vehicle,[20] and on 15 February 2017, ISRO launched one hundred and four satellites in a single rocket (PSLV-C37), a world record.[21][22] ISRO launched its heaviest rocket, Geosynchronous Satellite Launch Vehicle-Mark III (GSLV-Mk III), on 5 June 2017 and placed a communications satellite GSAT-19 in orbit. With this launch, ISRO became capable of launching 4-tonne heavy satellites into GTO. On 22 July 2019, ISRO launched its second lunar mission Chandrayaan-2 to study the lunar geology and the distribution of lunar water.
Future plans include development of the Unified Launch Vehicle, Small Satellite Launch Vehicle, development of a reusable launch vehicle, human spaceflight, a space station, interplanetary probes, and a solar spacecraft mission.
Explanation:
Compare the chemical reaction that causes the Statue of Liberty to look green with the chemical reaction that causes a bike to rust.
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:
https://brainly.com/question/489228
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Do plant and /or animal cells uses energy to carry out life processes?
Answer:
Yes/true/correct
Explanation:
I hope this helps! ^^
helpppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
A.
Explanation:
thnx for the brinliest
PLEASE NOWWW
A teacher places a sample of calcium oxide, a white solid, into a container of water. Students observe the formation of bubbles in the container. Next, the teacher removes a sample of an unknown substance from the container. The data table compares the properties of calcium oxide, water, and the unknown substance.
Which conclusion about the unknown substance does the data support?
The picture is on another question of mine.
Answer:
ummm b i am pretty sure that it is the answer
Explain The energy transformations that takes place as a skateboard coasting on a flat surface slows down and comes to a stop.
Answer:
Friction in the wheels transforms kinetic energy into thermal energy.
Explanation:
The Moon takes about one month to orbit Earth. Based on what you have learned and know, there would be two eclipses (one lunar and one solar) every month. Do you think this is realistic? Explain why or why not.
Answer:
it would not be
Explanation:
because the moon doesn't always go into earth's shadow
Answer:
It's true that the moon goes around Earth every month, but it doesn't always get in Earth's shadow. The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.
Explanation:
help please!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
HCl , Chocolate Milk , NaCl + H2O, Sand + H2O , Tea + Sugar
Explanation:
here the answer Deku
NEED HELP\
I GIVE BRAIN
Answer:
The first true or false Question, I believe to be true and the second one I think it is False
Explanation:
1. The Gulf of Mexico's water is very warm.
2. It tropical meaning a wet so it couldn't form over Dry land.
Hope this Helps :)
During a phase change, thermal energy is changing and temperature is _______
also changing
staying constant
increasing
decreasing
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.
Which of the following is one of the energy conversions taking place in a campfire? Heat to light Heat to kinetic Chemical to light Light to chemical
Answer:Heat to Light
Explanation:
Answer: I’d say either heat to light or chemical to light, but im more confident with heat to light
Hope this helps, and I’m sorry if it doesn’t it’s been a while sense I’ve done this :)
Explanation:
What is the ultimate source of energy for the blade of grass in the food web?
Answer:
sunlight
Explanation:
Answer:
A food chain consists of a series of organisms in which the first organism is ... It is very easy to trace almost anything you eat back to its original source of energy: the sun. ... An ecosystem can be as small and obscure as a blade of grass, a vernal
Explanation:
The image on the left shows a normal red blood cell, and the image on the right shows a cell that has been put into a new solution. The circles represent the salt in the solutions.
Which statement describes the motion of the water molecules in this situation?
The water molecules move by active transport into the cell from low water concentration to high water concentration.
The water molecules move by osmosis into the cell from low water concentration to high water concentration.
The water molecules move by osmosis into the cell from high water concentration to low water concentration.
The water molecules move by active transport into the cell from high water concentration to low water concentration.
Answer:
C. The water molecules move by osmosis into the cell from low water concentration to high water concentration.
Explanation:
The environment in picture 2 (the solution) has less solute (salt) and more water than in picture 1. Since the cell was isotonic (the same concentration of solute exists inside and outside the cell), if the cell were to be placed in an environment with more water, like in picture 2, water would diffuse through osmosis INTO the cell in order to maintain the same concentration of solute by diluting the solute present in the cell.
Jennifer is applying a constant force to swing a can on the end of a string, as shown here. If the can is moving around the circle at a constant speed, which statement correctly describes the motion of the can?
A.
The can accelerates at every point along the orbit and has changing velocity.
B.
The can has constant acceleration and changing speed.
C.
The can has constantly changing acceleration.
D.
The can moves at a constant velocity.
The statement that correctly describes the motion of the can is D. that the can move at a constant velocity.
Based on the information given, Jennifer is applying a constant force to swing the can. In this case, the force that's being acted on the can is at an unchanging rate.Also, the can is moving around the circle at a constant speed. This implies that the speed of the car reasons the same as it's neither increasing nor decreasing.Based on the information given above, since a constant force is applied by Jennifer, and the can is also moving at a constant speed, then the can move at a constant velocity.
In conclusion, the can move at a constant velocity
Read related link on:
https://brainly.com/question/23332275
plz help, science open answer
why is Galileo Galilei impotant?
Answer:
He provided a number of scientific insights that laid the foundation for future scientists. He also improved telescope that helped further the understanding of the world and universe.
Explanation:
Answer:it’s because Galileo Galilei is pretty much the father of today’s modern science
Explanation:
I hope this helps :)
Help me out please? Thank you!
Answer: Continental climates are classified by whether that fluctuates a lot. Hot summer, Cold winters and Little rainfall are all characteristics of Continental Climates
Explanation:
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: welcome
Answer:
evaporation
Explanation:
GUARANTEED BRAINLIEST IF ALL ANSWERED
Directions: Write a testable hypothesis in if…then…format for each of the following research problems. Identify the manipulated variable and the responding variable for each.
HINT: If (fill in manipulated variable), then (fill in responding variable)
6. What effect does high temperature have on radish germination?
____________________________________________________________________________________________________________________________________________________________________________________
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
7. What effect does studying with music have on student test scores?
____________________________________________________________________________________________________________________________________________________________________________________
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
8. What effect does food color have on the amount of food fish eat?
____________________________________________________________________________________________________________________________________________________________________________________
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
9. What effect does light have on plant growth?
____________________________________________________________________________________________________________________________________________________________________________________
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
10. What effect does smiling have on teacher giving no homework?
____________________________________________________________________________________________________________________________________________________________________________________
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________
Answer:
6.It is concluded that while high temperature has an unfavourable effect on seed set of radish plants, it also weakens the incompatibility reaction between pollen and style, so that the result is a small increase in yield.
7.The result of the study showed that music with a higher intensity is more distracting and has a greater effect on task performance and concentration. The result helped formulate the Attention Drainage Effect theory, which is based on Kahneman's (1973) capacity model of attention
8. If the food is more colorful then the fish will eat more because they're more interested in the colors
9.If plants do not receive enough light, they will not grow at their maximum rate or reach their maximum potential, regardless of how much of any other variable – water, growth medium or fertiliser – they receive. Light is the driving force for photosynthesis, a plant process that changes sunlight into chemical energy. Plants need five things in order to grow: sunlight, proper temperature, moisture, air, and nutrients. These five things are provided by the natural or artificial environments where the plants live. If any of these elements are missing they can limit plant growth.
The independent (or manipulated) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.
10.What effect does smiling have on a teacher giving no homework.
Hypothesis
If a student smiles at teacher, then no homework will be assigned
independent variable is smiling
dependent variable is homework
Explanation:
Answer:
#1 If the temperature is increased then radish germination will increase.
Independent variable: temperature
Dependent variable: radish germination
#2 if students study with music then their test scores will increase
Independent variable: Music
Dependent variable: student test scores
#3 if fish food is red than fish will eat more
Independent variable: fish food color
Dependent variable: amount of food eaten
#4 if the amount of sunlight is increased then plants will grow larger
Independent variable: amount of sunlight
Dependent variable: Plant size
#5 if students smile more then the teacher will assign less homework
Independent variable: Students smiling
Dependent variable: Amount of homework
I'm sorry but this question has no more space but i hope i helped this took a long time to type out. :)