make me brainliest
Explanation:
The observations are as follows: Initially with the plates in the dark, no electrons pass between the plates and no current flows. As we shine light on the plates, going from low energy red to high energy blue, suddenly current begins to flow. How?
Einstein explained the result be describing the light waves as packets of energy. He called the packets of energy photons. Each photon has a specific energy, the shorter the wavelength, the higher the energy. When a high-energy photon hits the plate (such as a green or blue), the photon has enough energy to knock out an electron and then the electron, being negative, will fly to the positive side. At this point, current flows.
The lower energy photons are unable to know out the electrons and no energy can flow.
The exciting thing to note is the treatment of energy as a particle or a packet, it is consistent with the fact energies are not additive. If we can bump electrons with light at 600 tera-hertz , we can�t just use 300 tera-hertz for twice the time and still expect to bump electrons.
What if the photon has greater than the threshold energy required to pop out an electron? The extra energy just goes into the kinetic energy of the electron. This relationship can be described by the following equation.
hf = w + KE
where hf is the energy of the photon.
w is the energy required to bump an electron.
KE is the kinetic energy of the electron.
If the photon has less energy than w, no electron is emitted.
True or False. An insulator has a higher resistance than a conductor.
Answer:In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.
Explanation:
Answer:
True
Explanation:
they are called insulator because they insulate energy or in other word they RESIST more energy.
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.
Which type of graph would best represent data from this experiment: Measuring the growth of a plant over 2 weeks? Question 1 options:
A. Line graph
B. Bar graph
C. Circle graph
Which of the following events could increase Earth's temperature?
Question 2 options:
A. a decrease in the relative percent of greenhouse gases
B. planting more trees
C. widespread removal of tropical forests
D. a reduction in the use of fossil fuels
Answer:
The answer is C & A.
Hope this helped you out!^^
Temperature measures the average kinetic energy of particles of the substances. Therefore, the correct option is option C that is widespread removal of tropical forests.
What is temperature?Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.
Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.
We can convert these units of temperature into one another. The relationship between degree Celsius and Fahrenheit can be expressed as:
°C={5(°F-32)}÷9
A decrease in the relative percent of greenhouse gases, planting more trees and a reduction in the use of fossil fuels will decrease the temperature of the earth. Widespread removal of tropical forests increase the temperature of earth.
Therefore, the correct option is option C that is widespread removal of tropical forests.
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Need help with this.
Answer:
Explanation:
H3PO4.
Answer:
I'm pretty sure it's H3PO4
The medulla _____.
interprets signals from the sense organs
controls heartbeat and breathing
controls balance and digestion
coordinates muscle movement
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.
Need help with this.
Answer:D
Explanation:
Answer:
here the answer would be D
Explanation:
if the two substances together have a different weight then the substance split but added together then this suggest that a new substance with a whole new mass was formed.
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
PLZ ANSWER FAST IM FAILING
All forms of Energy can cause change to occur except Potential energy. True False
Answer:
False!
Explanation:
Energy can only be transformed, changed from one form to another. List 6 forms of energy related to changes in matter.
Is this helpful? :D
Answer:
False
Explanation:
All forms of energy can cause change to occur.
helpppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
A.
Explanation:
thnx for the brinliest
ILL GIVE 30 POINTS TO THE BRAINIEST
How does a balanced chemical equation prove the Law of Conservation of matter?
Answer:
Every chemical equation follows to the law of conservation of mass, which states that matter cannot be created or destroyed. When you have an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced therefore it is following the law of conservation of mass.
Explanation:
Answer:
A balanced chemical proves the Law of Conservation of Matter because the law stats that matter cannot be created nor destroyed. so, in every chemical reaction the amount of matter will stay the same in the product as it did in the reactant.
In other words, balanced chem equations show that mass in conserved in chemical reactions
hope this helped:)
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
Which of the following statements about organelles is NOT true?
A. Each organelle carries out only one role in the life functions of the cell.
B. There are some organelles found in plant cells that are not in animal cells.
C. There are organelles in plant and animal cells that work directly with other organelles.
D. Each organelle carries out functions similar to the way organs function in a large organism.
Answer:
A. Each organelle carries out only one role in the life functions of the cell.
Explanation:
Answer:
D
Explanation:
I'm on the same question and my teacher said I was right if I'm wrong I do apologies
Which statement best describes the message of the poem? *
It about icruas flight pls help and it is the poem not the myth
A Icarus flew too far for no good reason.
B Icarus learned something by flying too far.
C Icarus had a habit of flying too far.
D Icarus was excited by flying too far.
The Newton is the SI unit for ____.
temperature
density
weight
mass
Answer:
Mass
Explanation:
Scientists claim that climate change is happening because Earth is warming. They also claim that humans have helped cause the warming by adding greenhouse gases to the atmosphere. Other people claim that Earth is not experiencing climate change because some winter days are still very cold. Use evidence to evaluate each claim about climate change.
help
this is science.
Answer:
There is solid proof that global warming is increasing and getting worse by t he day. The ice caps slowly melt more and more each year due to this which is a proven fact. On top of that, it has been proven that carbon emission by humans is bad for the environment and it helps increase the problem of global warming by weakening our atmosphere. As for the cold days, just because we have global warming doesn't mean the earth weather wont be cold. global warming is something that slowly happens and over time the temperature global has actually been increasing at a not very notice able pace.
Explanation:
Yes, climate is changing because of the human activities which are causing harm to the environment causing global warming.
What is global warming?Global warming is the long-term warming of Earth's climate system that has been seen from the pre-industrial period (between 1850 and 1900) as a result of human activity, principally fossil fuel combustion, which raises heat-trapping greenhouse gas levels in the atmosphere.
Evidence which claim about climate changeGreenland, Antarctica, and tropical mountain glaciers have all provided ice cores that illustrate how the Earth's climate responds to fluctuations in greenhouse gas levels. Tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks all contain ancient data.Yes, 97 percent of actively published climate scientists agree that people are to blame for global warming and climate change.Based on the data, nearly 97 percent of climate scientists agree that human-caused climate change is happening, according to the American Association for the Advancement of Science (AAAS).To know more about Global warming here
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Which of these statements about gravity are true?
Gravity helps us stay situated on Earth without floating away.
Gravity gives objects their mass.
Gravity holds our galaxy together.
Multiplying the mass of an object by the acceleration due to gravity gives the weight of the object.
Gravity helps scientists launch spacecraft out of Earth’s atmosphere.
Answer:
gravity holds our galaxy together
Explanation:
that is why we don't levitate into the air
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 :)
The planet Venus is surrounded by a thick layer of gases. In fact, the atmospheric pressure on Venus is over 90 times greater than the atmospheric
pressure on Earth. Which statements are true about boiling water on Venus? Choose the two statements that apply.
A. Water will boil at a higher temperature on Venus than on Earth.
B. Water will boil at a lower temperature on Venus than on Earth.
C. The temperature of water will remain constant while it boils.
D. The temperature of water will increase as it boils.
Answer:
d
Explanation:
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
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Kyle is swinging at the playground. As he moves from the top of the swing to the bottom he will _____.
a. lose potential energy and gain kinetic energy
b. gain potential energy and lose kinetic energy
c. change kinetic energy into mechanical energy
d. change potential energy into mechanical energy
Explanation:
dont trust me but i think its A
Answer:
b. gain potential energy and lose kinetic energy
Explanation:
I could be wrong but heres a definition of each word. Potential energy is the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors. Kinetic energy is energy which a body possesses by virtue of being in motion.
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]
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)
QUICK ANSWER THIS
Aerobic Respiration is the release of energy from food ________ the use of oxygen
A.With
B.Without
Answer:
A. with.
Explanation:
help please!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
HCl , Chocolate Milk , NaCl + H2O, Sand + H2O , Tea + Sugar
Explanation:
here the answer Deku
NEED HELP ASAP
I GIVE BRAINLY
Answer:
True, False, True, and False
Explanation:
plz help, science open answer
HELP HELP HELP HELP Please Help Will Mark Brainlyliest How does the amount and type of fuel impact the distance a spacecraft can travel
Answer:
Explanation:
Defining Emotional Appeal
An emotional appeal is used to sway the emotions of an audience to make them support the speaker’s argument.
LEARNING OBJECTIVES
Break down the components that make up an emotional appeal
KEY TAKEAWAYS
Key Points
Pathos represents an appeal to the emotions of an audience.
An emotional appeal uses the manipulation of the emotions rather than valid logic to win an argument.
Emotional appeal is a logical fallacy, whereby a debater attempts to win an argument by trying to get an emotional reaction from the opponent and audience.
In debating terms, emotional appeals are often effective as a rhetorical device, but are generally considered naive or dishonest as a logical argument, since they often appeal to the prejudices of listeners rather than offer a sober assessment of a situation.
Key Terms
logical fallacy: A fallacy; a clearly defined error in reasoning used to support or refute an argument, excluding simple unintended mistakes.
Emotional Appeal Defined
Pathos represents an appeal to the audience’s emotions. Pathos is a communication technique used most often in rhetoric (where it is considered one of the three modes of persuasion, alongside ethos and logos), and in literature, film, and other narrative art.
Emotional appeal can be accomplished in a multitude of ways:
By a metaphor or storytelling, common as a hook
By a general passion in the delivery
By an overall emotion
By the sympathies of the speech or writing as determined by the audience
The pathos of a speech or writing is only ultimately determined by the audience.
The Purpose of an Emotional Appeal
An emotional appeal is directed to sway an audience member’s emotions and uses the manipulation of the recipient’s emotions rather than valid logic to win an argument. An emotional appeal uses emotions as the basis of an argument’s position without factual evidence that logically supports the major ideas endorsed by the presenter. In an emotional appeal, persuasive language is used to develop the foundation of an appeal to emotion-based arguments instead of facts. Therefore, the validity of the premises that establish such an argument does not prove to be verifiable.
A US soldier holds his daughter and his son.
Emotional Appeal: A picture like this could be used as an emotional appeal for a charity campaign to increase funding for soldiers’ families.
Emotional appeal is a logical fallacy, whereby a debater attempts to win an argument by trying to get an emotional reaction from the opponent and audience. It is generally characterized by the use of loaded language and concepts (God, country, and apple pie being good concepts; drugs and crime being bad ones). In debating terms, emotional appeals are often effective as a rhetorical device, but are generally considered naive or dishonest as a logical argument, since they often appeal to the prejudices of listeners
Answer:
Space ships do not stop when they run out of fuel. ... As a result, there is essentially zero friction in space to slow down moving objects. Unlike ships in water, a ship in space does not need constant thrust to keep moving forward.
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:
