Answers
Explanation:
kinetic energy Increases due to gravity. A rock being pushed down a hill increases in speed, due to gravity, what goes up must come down....
Related Questions
Which of the following are made possible by energy transfer from the Sun? Choose all that apply.
A. biofuels
B. nuclear power using uranium
C. wind power
D. hydroelectric power using a dam
This is Really Science but I couldn’t find it but please help ASAP!
Answers
Which energy resource causes the greatest waste disposal concerns?
solar power
nuclear
coal
geothermal power
Answers
Earths outer core is made of ___
Answers
Answer:
iron and nickel (liquid metal )
Explanation:
The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around
Answer:
The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances.
Explanation:
What kind of reaction is this? *
Na + C1, → NaCl
Answers
Please help asap!!
A cooling curve has two flat lines, or plateaus. What does the plateau at the higher temperature represent?
Select one:
a. Increase in temperature of a liquid
b. Decrease in temperature of a gas
c. Condensation of a gas
d. Freezing of a liquid
Answers
hdhdhehehrhehshhehehrhfhfhf
A cooling curve has two flat lines, or plateaus. The plateau at the higher temperature represents condensation of a gas and the correct option is option C.
What is Cooling curve?
When a solid substance is heated until it is completely melted, and then heated further and allowed to cool slowly, the curve obtained by plotting temperature against time is known as the cooling curve.
The gradient of the cooling curve is related to the heat capacity, the thermal conductivity of the substance, and the external temperature. The more heat is required to change the temperature of the substance, the slower it cools, so the smaller the gradient of the curve. The higher the thermal conductivity, the faster heat is transferred, so the faster the substance cools.
Therefore, A cooling curve has two flat lines, or plateaus. The plateau at the higher temperature represents condensation of a gas and the correct option is option C.
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Sound waves are longitudinal, mechanical, compression waves.
A. True
B. False
Answers
Answer:
True
Explanation:
Sound waves traveling through air are indeed longitudinal waves with compressions and rarefactions. As sound passes through air (or any fluid medium), the particles of air do not vibrate in a transverse manner.
Answer:
true
Explanation:
ape x
It’s a simple question in Welding when you use a torch if you add a lot of oxygen to the fuel what happens does it burn faster or what I want to know
Answers
Answer:
Easy, the flame is smaller but burns hotter.
Explanation:
How many moles are equal to 4.11x10^23 molecules of carbon dioxide?
Answers
Answer: 0.68 mole
Explanation:
1 mole (of any atom/molecule) = 6.02214076*10^23
0.683 moles are equal to 4.11x10²³ molecules of carbon dioxide.
What do you mean by the term mole?A mole is a unit of measurement in the International System of Units (SI) used to express an amount of a substance.
One mole is defined as the amount of a substance that contains as many elementary entities as there are atoms in 12 grams of pure carbon-12.
This number is known as Avogadro's number and is approximately 6.023 x 10²³.
Given:
For the number of moles of carbon dioxide in 4.11x10^23 molecules Avogadro's number = 6.023x10²³ particles per mole.
Therefore, the number of moles of carbon dioxide can be calculated as:
moles = number of particles / Avogadro's number
moles = 4.11x10²³ / 6.022x10²³
moles = 0.683 moles
Thus, 4.11x10²³ molecules of carbon dioxide are equal to 0.683 moles of carbon dioxide.
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Energy can generally be considered to be either kinetic energy or potential energy. Some specific forms of energy, such as
electrical, magnetic, and gravitational energy, can operate in the space around objects and affect other objects that come near. In
these examples
A. energy is continuously created.
B. energy is continuously destroyed.
C. energy exists in a field.
D. all of these
Answers
Answer:
d hope it's right hope this helps
Answer:
Energy exists in a field.
Explanation:
Electrical field, magnetic field, and gravitational field.
A and B are wrong otherwise the law of conservation of energy would be violated
2021 by Mrs. Groves Closes at 2/9/2021, 12
Which layer of Earth is divided into plates?
Mantle
Crust
Inner core
Outer core
Answers
Answer:
It would be the Mantle,I believe
Which two climates have very low levels of precipitation
A dry and polar
B polar and highlands
C highlands and temperate marine
D temperature marine and temperature continental
Answers
Answer:
B highlands and polar, very little percipitation is found in polar regions, and high lands contributes to that
Explanation:
Answer:
B!
Explanation:
got it right on quiz. edu2021
Are ionic compounds polar or non-polar?
Answers
Answer:
polar
Explanation:
Answer:
If the electronegativity difference between the atoms is greater than 2.0, the bond is ionic. Ionic compounds are extremely polar molecules.
Explanation:
What is the difference between the structure of simple and complex carbohydrates?
Answers
Answer:
Simple carbs break down easier and contain sugars. Complex carbs contain starch and fiber.
Explanation:
Answer Image result for What is the difference between the structure of simple and complex carbohydrates?
Simple vs Complex Carbs. Carbohydrates are sugars that come in 2 main forms – simple and complex. This is also referred to as simple sugars and starches. The difference between a simple and complex carb is in how quickly it is digested and absorbed – as well as it's chemical structure.
In the presence of an acid catalyst, cyclohexanol (100.16 g/mol) is dehydrated to give cyclohexene (82.14 g/mol) and water. Reaction scheme illustrating the dehydration of cyclohexanol in the prescence of acid catalyst to cylcohexene and water. A dehydration reaction starting with 4.1 g cyclohexanol produces 3.0 g cyclohexene. Calculate the percent yield for this reaction. Report your answer with two significant figures.
Answers
Answer:
88%
Explanation:
Step 1: Write the balanced equation
C₆H₁₁OH ⇒ C₆H₁₀ + H₂O
Step 2: Calculate the moles corresponding to 4.1 g of C₆H₁₁OH
The molar mass of C₆H₁₁OH is 100.16 g/mol.
4.1 g × 1 mol/100.16 g = 0.041 mol
Step 3: Calculate the theoretical yield, in moles, of C₆H₁₀
The molar ratio of C₆H₁₁OH to C₆H₁₀ is 1:1. The theoretical yield of C₆H₁₀, in moles, is 1/1 × 0.041 mol = 0.041 mol.
Step 4: Calculate the mass corresponding to 0.041 moles of C₆H₁₀
The molar mass of C₆H₁₀ is 82.14 g/mol.
0.041 mol × 82.14 g/mol = 3.4 g
Step 5: Calculate the percent yield of C₆H₁₀
We will use the following expression.
percent yield = experimental yield/theoretical yield × 100%
percent yield = 3.0 g/3.4 g × 100% = 88%
A reaction mixture in a 5.19 L flask at a certain temperature contains 26.9 g CO and 2.34 g H2. At equilibrium, the flask contains 8.65 g CH3OH. Calculate the equilibrium constant (Kc) for the reaction at this temperature.
Answers
Answer:
26.7
Explanation:
The reaction that takes place is:
CO + 2H₂ ↔ CH₃OHWe convert the given masses to moles, using their respective molar masses:
CO ⇒ 26.9 g ÷ 28 g/mol = 0.961 molH₂ ⇒ 2.34 g ÷ 2 g/mol = 1.17 molCH₃OH ⇒ 8.65 g ÷ 32 g/mol = 0.270 molThe initial concentrations for each species are:
CO ⇒ 0.961 mol / 5.19 L = 0.185 MH₂ ⇒ 1.17 mol / 5.19 L = 0.225 MCH₃OH ⇒ 0While the equilibrium concentration for CH₃OH, [CH₃OH]eq is:
0.270 mol / 5.19 L = 0.052 MWe put the data in a table:
CO + 2H₂ ↔ CH₃OH
initial 0.185 0.225 ↔ 0
eq (0.185 - x) (0.225-2x) ↔ x
We know that x = 0.052 M (That's the equilibrium concentration of CH₃OH).
We proceed to calculate [CO]eq and [H₂]eq:
[CO]eq = 0.185 - 0.052 = 0.133 M[H₂]eq = 0.225 - 2*0.052 = 0.121 MFinally we calculate the equilibrium constant:
Kc = [tex]\frac{[CH_3OH]_{eq}}{[CO]_{eq}([H_2]_{eq})^2}[/tex] = 26.7The equilibrium constant (Kc) for the reaction at this temperature is 26.7
Chemical reaction:CO + 2H₂ ⇄ CH₃OH
Conversion of moles:CO ⇒ [tex]\frac{26.9 g}{28 g/mol} = 0.961 mol[/tex]
H₂ ⇒ [tex]\frac{2.34 g }{ 2 g/mol} =1.17 mol[/tex]
CH₃OH ⇒ [tex]\frac{8.65 g}{32 g/mol} = 0.270 mol[/tex]
The initial concentrations for each species are:CO ⇒ [tex]\frac{0.961 mol}{5.19 L} = 0.185 M[/tex]
H₂ ⇒ [tex]\frac{1.17 mol}{5.19 L } = 0.225 M[/tex]
CH₃OH ⇒ 0
While the equilibrium concentration for CH₃OH, [CH₃OH]eq is:[tex]\frac{0.270 mol}{ 5.19 L} = 0.052 M[/tex]
We put the data in a table:
CO + 2H₂ ⇄ CH₃OH
Initial 0.185 0.225 0
Equilibrium (0.185 - x) (0.225-2x) x
x = 0.052 M (That's the equilibrium concentration of CH₃OH).
We proceed to calculate [CO]eq and [H₂]eq:
[tex][CO]_{eq}= 0.185 - 0.052 = 0.133 M\\\\\\[H_2]_{eq} = 0.225 - 2*0.052 = 0.121 M[/tex]
Calculation of equilibrium constant:[tex]K_c =\frac{[CH_3OH]_{eq}}{[CO]_{eq}[H_2_{eq}]^2} = 26.7[/tex]
Thus, the equilibrium constant (Kc) for the reaction at this temperature is 26.7
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Which of the following structures provides support and movement ?
A. Heart and skin.
B. Nerves and brain
C. Lungs and spine.
D. Bones and muscles
Answers
Answer:
The answer is C.
Explanation:
This is because you wouldn't be able to function without your lungs and spine. So therefore the answer would have to be "C".
How many atoms are in 123 g of calcium
Answers
Answer:
Molar mass of Ca = 40 g / mol , given 123 g Ca is 123/40= 3.075 moles,
1 mole = 6.022 * 10^23 atoms, so 3.075 moles Ca= 18.51*10^23 atoms
Explanation:
The number of atoms present in 123 g of calcium is 18.51 x 10²³ atoms.
What is calcium?Calcium is an element present in the periodic table. It is very much needed for the strength of the bones and teeth.
"Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound."
"The mole is a SI unit of measurement that is used to calculate the quantity of any substance".
First, calculate the moles
Moles = mass / molar mass
Molar mass of Ca = 40 g / mol
Given 123 g Ca is mass
123 / 40 = 3.075 moles,
1 mole = 6.022 x 10²³ atoms,
6.022 x 10²³ is the Avogadro number. It equals to one mole.
So 3.075 moles Ca= 18.51 x 10²³ atoms.
Thus, the number of atoms present in 123 g of calcium is 18.51 x 10²³ atoms.
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Some bacteria cells make people sick by releasing large molecules called toxins that affect your bodies. What
process would a bacteria cell likely use to release such large molecules?
Answers
Answer: Exocytosis is the reverse of endocytosis. Quantities of material are expelled from the cell without ever passing through the membrane as individual molecules. By using the processes of endocytosis and exocytosis, some specialized types of cells move large amounts of bulk material into and out of themselves.
Explanation:
Answer: Toxins may function to establish productive colonization conditions and work by damaging host cell membranes, by inhibiting host cell protein synthesis, and by activating secondary messengers that adversely affect host cell function.
Explanation:
infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.
WOW IM A NERD
DAE
On the first day of school, a class of fifth-grade students are given four identical cubos of hard clay. The cubes are placed in four different conditions until the last day of school. At that time, the students make the following
observations
Sample 1: classroom cabinetno noticeable changes
Sample 2 near a window lighter in color
Sample 3: freezer - small cracks near comers
Sample 4 bottle of water small amount of algae on top Which sample shows evidence of physical weathering?
Sample 1
Sample 2
оооо
C
Samples
Sample 4
Answers
Answer:
sample 3
Explanation:
i did this
Answer:
Sample 3
Explanation:
physical weathering means the breaking down of an object physically and the small cracks represent physical change.
in what way are these flowers similar from one another?
Answers
Answer:
do you have names or pictures?
Explanation:
In a heterogeneous chemical reaction requiring the use of a solid catalyst, the rate of the reaction could not be increased by increasing the concentration of reactants, but was doubled by doubling the amount of solid catalyst added. This probably indicated that
Answers
Answer:
The active sites on the initial amount of catalyst were fully saturated
Explanation:
A catalyst is a substance which alters the rate of a chemical reaction but largely remains unaltered at the end of the reaction. A catalyst has an active site which enables it to catalyze a reaction.
The active site provides the best possible orientation for reactant molecules to collide in order to form products.
When the active sites are not fully saturated with reactant molecules, more reactant molecules can bind and the reaction can proceed much faster. However, if the active sites of the catalysts are fully saturated, the reaction has maximum velocity and cannot go anymore faster.
Addition of more catalyst molecules can however make the reaction proceed faster as a it provides more active sites for reaction for the reactants.
show the formation of Mgion and Oion.
Answers
Cation present in MgO→Mg
2+
Anion present in MgO→O
2−
The diagram illustrates photosynthesis.
Which best describes what is happening in the area marked X?
Carbon dioxide enters the stem through xylem.
Oxygen enters the stem through stomata.
Water is carried to the leaves by stomata.
Water is carried to the leaves by xylem.
Answers
Answer:
I think Water is carried to the leaves by xylem.
Answer:
d
Explanation:
1. A gas has a volume of 5.30 mL and a mass of 24.10 grams. What is the
density?
Answers
Answer:
4.5472g/ml rounded of to 4 s.f
Explanation:
Density= Mass/ Volume
what happens when you continue to add a solute to an already saturated solution
Answers
Answer: nothing. It remains undissolved
Explanation: saturated = dissolved as much solute as solvent can contain
3. A gram food sample is burned completely in a calorimeter that contains 1000. of water The temperature of the water increases 23.65 degrees * C . How many Calories does the food have per gram ?
Answers
The food has 23629.64 cal
Further explanationGiven
mass = 1000 g of water
temperature increases 23.65 * C
Required
The energy of the food
Solution
Heat absorbed by water :
Q = m . c . Δt
Q = 1000 g x 4.184 J/g°C x 23.65 °C
Q = 98951.6 J
1 Joules = 0.2388 Calories
98951.6 J = 23629.64 cal
If a substance has a large mass and a small volume how dense is it
Answers
Answer:
Very dense.
Explanation:
Conceptually, you are taking a large amount of atoms and putting them into a small container. This means the spaces between atoms has to be smaller and the substance is more dense. (see image)
Mathematically, the equation for density is mass divided by volume ([tex]Density=\frac{m}{v}[/tex] ). If you divide a big number by a small number, you still have a pretty big number (ex 4/2=2 versus 6/1=6)
The diagram below shows part of the rock cycle. (6 points)
Rock cycle with a volcanic eruption at the top. Moving counterclockwise, there is an arrow pointing to Rock B. From Rock B there is an arrow labeled sediment and compaction pointing to Rock C. From Rock C there is an arrow labeled heat and pressure pointing to Rock A. From Rock A there is an arrow labeled magma pointing back to volcanic eruption.
Which type of rock does B represent?
Igneous rock
Metamorphic rock
Rock formed by compaction
Rock formed by heat and pressure
Answers
Answer:
Igneous Rock
Explanation:
Assuming this is a cycle, the volcanic eruption would lead back to rock B; rocks formed by volcanic eruptions are considered Igneous.
Answer:
igneous rock
Explanation:
theres this song that i was taught in fourth grade that kind of helped me remember. metamorphic is heat and pressure, sedimentary is erosion and weather, and igneous is cooled magma. rock be is shown after the volcano
How many moles of O2 are needed to produce 2.5 moles of water?
Answers
Answer:
Mass of oxygen = 16 * 1.25 = 20 g
Explanation:
David Robinson, a professional basketball
player, is 7 ft, 1.0 in. tall. Convert his height to
centimeters
Show work please
Answers
Answer:
215.9 cm
Explanation:
1 foot= 30.5cm
30.5cm times 7 1/12=215.9cm
The given height of David is 7 ft, 1.0 inch, so in centimeters, the height will be 216.4 cm.
What is unit conversion?A conversion factor is a number that is used to multiply or divide one set of units into another. When converting to an equal value, the appropriate conversion factor must be used.
We must convert one unit to another in order to achieve accuracy and avoid measurement confusion.
We do not, for example, measure the length of a pencil in kilometers. In this case, one must convert kilometers (km) to centimeters (cm) (cm).
To convert feet to centimeters, multiply the given foot length by 30.48 cm.
So,
Height in cm will be = 7.1 x 30.48
Height in cm = 216.4cm
Thus, the height of David in centimeters is 216.4 cm.
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