As a rock falls, some of its potential energy is transformed into kinetic energy. What is true about the mechanical energy during this transformation?
A.
It decreases because potential energy is a kind of mechanical energy.
B.
It does not change because kinetic energy and potential energy are both kinds of mechanical energy.
C.
It increases because kinetic energy is a kind of mechanical energy.
D.
It does not change because kinetic energy and potential energy are not kinds of mechanical energy.
Answer:
a or b
Explanation:
because those are the most likely to be true
now it gives you two options so i thinks it might be B but you could choose A you got two options choose wisely
can waves travel through empty space? why?
Answer:
Elctromagnetic waves can travel through empty space.
Explanation:
Waves that may pass through matter or empty space are known as electromagnetic waves. The electromagnetic field, like the other basic fields, penetrates the whole universe, including the region we refer to as empty space. There are no fields in space. The medium through which electromagnetic waves travel is called the electromagnetic field.
page 550-555 science fusion 7th grade book
Answer:
how do I answer with no question?????????????
Calculate the number of copper atoms in 2.45 mole of copper
Answer:
1.48×10²⁴ Cu atoms
Explanation:
For this question you need to use Avogadro's number 6.022×10²³atoms.
2.45 moles of Cu ×[tex]\frac{6.022x10x^{23} atoms }{1 mole}[/tex]= 1.47539×10²⁴ atoms.
The moles cancel out so you are left with atoms.
Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.
i neeeeed help now !!!!!!!!!!!!!!!!!!!
Answer:
D
Explanation:
Which of the following is a property of water?
Can someone please help me?
Answer:
c i think
Explanation:
10. If 200 mL of gas weighs 0.344 grams at STP, what is its molecular mass? (1000 mL = 1 L)
The molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol. Details on how to calculate molecular mass can be found below.
How to calculate molecular mass?The molecular mass of a gas can be calculated by using the following expression:
At STP, the gas weighs 0.344 grams. volume = 200mL = 0.2LMolecular weight of the gas = mass × volume at STP (22.4L)/ volume of gas
= 0.344 × 22.4/0.2
= 7.7056/0.2
= 38.53g/mol
Therefore, the molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol.
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Interview with tom zambrano why does tom zambrano think that renewable energy science is a good choice for a career?
Zambrano thinks that renewable energy science is a good choice for a career it reproduciable and eco friendly
What is Renewable Energy
Renewable energy science can be defined as the study of the various types of energy that can be reproduced even after been deplited.
Examples of renewable energy is the Solar, Wind, Geothermal Enegy etc.
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This Is the sample response on edge:
There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.
- Have it on edge, Have a good day :)
Predict what would happen to the strength of the electromagnet in each situation. using a battery with a higher voltage: wrapping the wire around the nail only three times: changing the direction of the current by reversing the battery connections: using a plastic stick in place of the iron nail: holding the nail vertically rather than horizontally:
The the strength of an electromagnet varies with the quantity and direction of current as well as the number of turns in the coil.
What as is an electromagnet?An electromagnet is a material which operates by the principle of electromagnetism.
Electromagnets possesses both electrical and magnetic properties.
The strength of an electromagnet is affected by the current, the number of turns as well as the material of the electromagnet.
The strength of the given electromagnet will be affected thus:
increases when using a battery with a higher voltagedecreases when wrapping the wire around the nail only three timesis unchanged when changing the direction of the current by reversing the battery connectionsdecreases when using a plastic stick in place of the iron nailis greatest when holding the nail vertically rather than horizontally.Therefore, the strength of an electromagnet is affected by current and number of turns in the coil.
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Answer:
Using a battery with a higher voltage:
✔ stronger force of attraction
Wrapping the wire around the nail only three times:
✔ weaker force of attraction
Changing the direction of the current by reversing the battery connections:
✔ no change
Using a plastic stick in place of the iron nail:
✔ weaker force of attraction
Holding the nail vertically rather than horizontally:
✔ no change
Explanation:
Did it in edge 2023 with effort
کا
Find the moles of sulfur produced, if 2.5 moles of sulfur
dioxide are used in the following chemical reaction.
SO2 + 2H2S + 2H2O + 3S
a 7.5 mol
Answer:
7.5mols of S
Explanation:
just make sure your equation is balanced, and in this case it's balanced,
so now you can do more to more ratio.
so in this case we are dealing with SO2 and S.
According to our balanced equation we have 1 mol of SO2 producing 3mols of S, i.e
1mol(SO2). : 3mols(S)
we've been asked that if we use 2.5 moles of SO2, how many moles of S will be produced?
So, this is how we can determine the number of moles of S that will be produced .
SO2 : S
1mol : 3mols(S)
2.5mols: x
we cross multiply
x=2.5×3
x=7.5mols of S.
.: if we use 2.5 mols of SO2,, 7.5mols of Sulfur will be produced
Dominic made the table below to organize his notes about mixtures. A 1-column table. The first column labeled properties of mixtures has entries has no set composition, must have more than one state of matter, must have more than one substance. What mistake did Dominic make? The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed. There is a definite recipe to make each mixture, so the composition of a mixture is set. Although it is possible to have more than one state, it is also possible to have only one state. A single substance can be used to make a mixture if the substance is composed of more than one element.
Answer:
although it is possible to have more than one state, it is also possible to have only one state
What is the equilibrium constant, K, for the following reaction, if the concentration of N2 was measured to be 0.521 M, H2 was measured to be 0.482 M, and NH3 was measured to be 3.17 M
The equilibrium constant is the relation between the products and the reactants of the reaction. The K, for the reaction, is 172.
What is the equilibrium constant?The equilibrium constant (K) is the relationship in the form of a ratio that denotes the concentration of the products to the reactants in a reaction.
The balanced chemical reaction is shown as,
[tex]\rm N_{2}(g) + 3H_{2}(g) \leftrightharpoons 2NH_{3}(g)[/tex]
Given,
Concentration of nitrogen =0.521 M
Concentration of hydrogen = 0.482 M
Concentration of ammonia = 3.17 M
The value of K is calculated as:
[tex]\begin{aligned} \rm K &= \rm \dfrac{[NH_{3}]^{2}}{[N_{2}][H_{2}]^3}\\\\&= \dfrac{(3.17)^{2}}{(0.521)(0.482)^{3}}\\\\&= 172\end{aligned}[/tex]
Therefore, the equilibrium constant for the reaction is 172.
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An unknown substance is found to have a high melting point. In addition, it is a poor conductor of electricity and does not dissolve in water. The substance most likely contains
Answer:
It contains lonic crystals
Explanation:
A student investigated some properties of lead and recorded the findings in the table below. property observation color dull gray density 11.3 g/cm3 volume of sample 3 cm3 melting point 327°c reaction with air lead oxide forms on the surface electrical conductivity conducts some electricity which statement is true with respect to the investigation? the student investigated only the physical properties of lead. the student investigated only the chemical properties of lead. the student investigated more physical properties than chemical properties of lead. the student investigated more chemical properties than physical properties of lead.
According to the given observation table a student investigate more physical properties than chemical properties of lead.
What is physical and chmical properties?Physical properties of any substance is that proprties which are observable from the simple eyes and in which original chemical composition of substance is not changes. But at the same time some chemical properties are not observable from the simple eyes and in this change in chemical composition also takes place.
Color, density, volume, melting point and electrical conductivity are the physical properties.Reaction with air is a chemical property.Hence student investigate more physical properties than chemical properties of lead.
To know more about physical and chemical properties, visit the below link:
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Answer:
The answer is "The student investigated more physical properties than chemical properties of lead."
Explanation:
C
map
What is a possible elevation for point X?
Question 5 options:
1750 m
1550 m
1650 m
1701 m
Answer: 1650 hope i got it in time.
Explanation:
Answer:
C
1650
Explanation:
Verified Answers With Verified Results
which part of the periodic table would contain an element with a partially filled f sublevel?
Answer:
the blue one is f sub level in period table
A 24.0 g sample of iron
was heated from 0°C
to 35.0°C. It absorbed
4087.4 J of energy as
heat. What
is the specific heat of
this piece of iron?
Round to the nearest
whole number.
Answer: 5
Explanation:
Calculate the amount you would measure out if you wanted exactly one mole of each of the following:
Show calculation
a) Uranium
b) Magnesium
Answer:
See below
Explanation:
I do not know the 'calculation ' to find this answer....you should just look at the periodic table of elements
U = 238.02 gm /mole
Mg = 24.305 gm/mole
Does the question want you to weigh out protons neutrons and electrons?
What is the term for transfer of energy from one molecule to another upon absorption of light energy
Answer:
food chain
Explanation:
it is transferring energy from one molecule to another in a food form
name the 6 properties of water and an example of each
Answer:
High Polarity
Lower Density Of Ice The reason icebergs are floating on the sea surface is because of this lower density. ...
High Heat Of Evaporation When water starts evaporating off of a surface, it creates an effect of cooling. ...
High Specific Heat Water manages to stay liquid because of two of its properties, high specific heat, and its high heat of vaporization. ...
Attraction To Other Polar Molecules The property of cohesion allows liquid water to have no tension on the surface.
Explanation:
state two criteria for determining the purity of a substance
Answer:
boiling point and melting point
Explanation:
the difference of the boiling point and the condensation temperature
Can someone please help me?
Answer:
I know its not Oxygen (O2) because we need that gas to breath if not more of that gas! and i know its not helium because it is not very toxic and not a crisis in the world
Your answers are going to be B. and D.
have a nice day!
A compound is formed when the
atoms that combine to make a
molecule are different elements.
H₂O Is a COMPOUND a pure or
non-pure substance?
Answer:
Atoms combine to form compound for the sake of stability . Atoms either share electrons and form covalent bond or there is unequal distribution of electrons between atom, so ionic bond is formed
1. Which of the following are biotic factors in an ecosystem? *
O Rain, sunlight, and plants
O Plants, animals, bacteria
O Temperature, animals, plants
O Animals, minerals in the soil, rain
Answer:
plants animals bacteria
Assume that the mass of the Cu electrode changes by x grams in a certain period of time. Write a mathematical expression for the change in mass of the Zn electrode during the same period of time.
Assuming the quantity of current passing through the zinc and copper electrolytes is the same, mass of Zinc deposited is (x/64) × 65.0 g.
What is electrolysis?Electrolysis is the decomposition of a substance known as an electrolyte when electric current is passed through its solution or molten form.
The mass of an electrolyte deposited when current is passed is dependent on the current and the charge on the ion.
In the electrolysis of copper and zinc, assuming the quantity of current passed through their solution are the same, the moles of each zinc and copper deposited will be the same since the charges on their ions are the same.
Assuming x g of copper is deposited.
molar mass of copper = 64.0 g
molar mass of Zinc = 65.0 g
moles of copper deposited = x/64
moles of zinc deposited = x/64
mass of Zinc deposited = (x/64) × 65.0 g
Therefore, the mass of Zinc deposited is (x/64) × 65.0 g.
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Which indicator is yellow in a solution with a ph of 9. 8.
Answer:
methyl orange
Explanation:
i hope i hrlped you
A fossil bone has 25% of radioactive parent isotope remaining. How many half-lives have passed
Answer: 10 half-lives have passed.
Explanation:
in an atom the number of electron is what as the number of protons???
What reaction produces ethanol ?
1, combustion
2, esterification
3,fermentation
4, polymerization
Answer:
3.) Fermentation
Explanation:
Ethanol = EtOH = C₂H₅OH
Combustion:
CH₄ + 2O₂ --> 2H₂O + CO₂
Esterification:
R-CO₂H + R-OH --> R-CO₂H-R' + H₂O
Fermentation:
C₆H₁₂O₆ --> 2C₂H₅OH + 2CO₂
Polymerization:
Hydrocarbons combining to make longer hydrocarbon chains