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
Answers
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]
Related Questions
PLZ ANSWER FAST IM FAILING
All forms of Energy can cause change to occur except Potential energy. True False
Answers
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.
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.
Answers
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
Students begin to measure the speed of a ball rolling down a ramp. The graph below shows their results.
Answers
Answer:
Your answer to your current question is D.20!
Explanation:
If the ball is rolling down from a ramp, it should start at the top, which is 20, then it rolls down to the bottom. But since the ball starts from the top, 20 is the speed since that number is at the top as well, showing what the speed measurement is.
Hope this helped and have a good day! :D
If all three metals were exposed to extremely high temperatures, which would be the last to melt?
(gold, mercury,copper)
I WILL GIVE BRAINLIST!!!
Answers
Answer:
copper
Explanation:
because copper melts at 1,083
gold at 1 064
mercury at - 38
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: ________________________________________________________________________
Answers
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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what is one way water moves through the nonliving parts of an ecosystem during the water system?
Answers
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
Need help with this.
Answers
Answer:
Explanation:
H3PO4.
Answer:
I'm pretty sure it's H3PO4
What is the difference between a saturated solution and an unsaturated solution?
Answers
anybody wanna help?????
Answers
Answer:
straight line down then left and right that should be it
Explanation:
Please help ill mark branliest (im using the last of my points for this so please don't scam me)
can someone write about genetically modified foods and the genetic modification process?
Answers
Answer:
ok :)
Explanation: genetically modified organisms (GMOs) are being made by inserting a gene from an external source such as viruses, bacteria, animals or plants (etc) into foods. Genetically modified foods seem to be not as healthy as unmodified foods, according to research. also many people are against it due to the fact that some people go overboard and add too many genetically modified organisms, which causes health risks and unfortunately harms people. sometimes genetically modified food contains toxins and antibiotics. srry i couldnt find much on the process but this is based off my background knowledge so yeah
Need help with this.
Answers
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.
The Newton is the SI unit for ____.
temperature
density
weight
mass
Answers
Answer:
Mass
Explanation:
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)
Answers
Convection
Radiation
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.
Answers
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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An element is a ________ substance
A. Mixed
B. Pure
C. Combined
D. Human-made
Answers
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......
Please help 20 points!
Answers
HELP PLZ
What is the traditional definition of gravity?
Answers
Answer:
A force of attraction between things that have mass. Gravity can act between objects that are not even touching. In fact, gravity can act over very long distances. However, the farther two objects are from each other, the weaker is the force of gravity between them.
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
Answers
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.
Carbonic acid is a mixture of
Answers
Answer:
a compound of the elements hydrogen, carbon, and oxygen. (also carbonic acid is a compound not a mixture ^-^)
Explanation:
hope this helps dude
According to the concept of solubility, carbonic acid is a mixture of water and carbon dioxide.
Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
A mixture of water and carbon dioxide under high temperature and pressure forms carbonic acid as it is highly soluble,thus carbonic acid is a mixture of water and carbon dioxide.
Learn more about solubility,here:
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Increase the brightness of the light for the colors red, yellow, orange, and green. What effect did the brightness of the light have on the metal?
(science)
Answers
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.
Nitrogen is to the immediate left of oxygen in the same row in the periodic table. Which of the following statements compares the radius and number of protons of nitrogen and oxygen atoms?
Nitrogen has a smaller radius and one less proton than oxygen.
Nitrogen has a larger radius and one less proton than oxygen.
Nitrogen has a smaller radius and one more proton than oxygen.
Nitrogen has a larger radius and one more proton than oxygen.
Answers
Answer:
The answer is Nitrogen has a larger radius and one less proton than oxygen.
Explanation:
Nitrogen is a gas and gas expands to fill up an area so oxygen would be pushed out and the Nitrogen would take over.
Answer:
The answer is Nitrogen has a larger radius and one less proton than oxygen.
The bond between Hydrogen and Chlorine would be ???
Answers
Answer:
chlorine and hydrogen atoms form a single covalent bond. in hydrogen chloride gas because the electrons are shared, not transferred from one atom to another.
volcanic activity can be responsible for major climate and landscape changes to an area. Which of the following types of volcanic activity has the greatest effects on climate?
A: Quiet eruptions
B: Earthquakes
C: Island building
D: Ash in the atmosphere
BRAINLIEST
Answers
Answer:
I'm pretty sure the answer would be B
Explanation:
A few months ago I had an obsession with this volcano book but it sounds the most accurate I mean everything else on there would cause stuff but earthquakes cause so much damage to the earth.
Answer: A is your answer
Explanation:
Need help with this.
Answers
Answer:
D
Explanation:
because it is changing to its own compound of chemicals.
Plz help!
Researchers have been studying how emissions from both volcanoes and human activities, such as the burning of fossil fuels, impact the atmosphere. Both types of emissions contribute to the total CO2 levels in the atmosphere. Graph 2 shows that atmospheric CO2 levels have been steadily increasing over time. This increase in CO2 levels has been linked to the increase in global surface temperatures.
Explain why the total mass of carbon must be decreasing in a different step of the slow carbon cycle based on the on the increase in atmospheric CO2.
Answers
Answer:
The total amount of carbon in the world is not changing. Because matter is
conserved in all processes and reactions, carbon must decrease in one place if it increases in another.
Explanation:
hope this helped!
Need help please With this.
Answers
A 200 g sample of water at 60.0 degrees Celsius is heated to water vapor at 140.0 degrees Celsius. Expected Answer = 501,440 J Before trying to solve this problem, explain:
what is happening to the water from 60.0 degrees Celsius to 100.0 degrees Celsius?
what happens at 100.0 degrees Celsius?
what happens from 100.0 degrees Celsius to 140.0 degrees Celsius?
Then solve the full problem, showing work & units.
Answers
Which statements would best represent a model Newton's Law of action-reaction?
A.
toy car rolling down a ramp
B.
toy rocket down a ramp
C.
toy boat floating in the water
D.
toy tractor being pushed over a hill
Answers
Answer:
A
Explanation:
Answer:
Explanation:
It can be several answers as long as you verify your point on why.
Newton's Law of action-reaction says that 'For every action, there is an equal and opposite reaction.'
A: the toy car will be rolling down the ramp, there will be friction and kinetic energy.
C: A toy boat The toy boat pushes against the water (action force), the water pushes back on the boat (reaction force) and pushes it forward.
Sorry if i'm wrong
If the inclination angle is 15 how does the path of the Sun in the sky change as the planet moves from the right side of its orbit to the left?
Answers
Answer:
There is no change in the angle at which sunlight strikes the ground. When the inclinatio n angle is 23 degrees, the longest sunlit period is about 15 hours, and the shortest is about 9 hours.
Explanation:
Which of the following statements is true?
Like magnetic poles attract each other
There is no relationship between magnetic poles
Like magnetic poles repel each other
Answers
Answer:
Like magnetic poles repel each other
Explanation:
Among the following statements, the one that is true is Like magnetic poles repel each other.
What are magnets?Magnets are substances which possess their own magnetic field this magnetic field basically arises from the circular movement of negatively charge electrons. The elements which have unpaired electrons and have spin angular momentum or orbital angular momentum or they are together present are called as Magnets.
The magnetic field present is invisible but it is definitely responsible for the most notable property of a magnet. Magnetic force is a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets.
Therefore, Among the following statements, the one that is true is Like magnetic poles repel each other.
Learn more about Magnets here:
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