Answer:
More mass means more force is needed to achieve the same change in speed in the same amount of time. That force is transmitted from the road, to the tires, to the wheels, through the brakes, to the frame and rider.
The weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.
What is Acceleration?
Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities which have magnitude as well as direction.
The orientation of the acceleration of an object as given by the orientation of the net force acting on that object. It is expressed as:
[tex]\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\overline{a} = average acceleration\\v = final velocity\\v_0 = starting velocity\\t = elapsed time[/tex]
Acceleration is proportional to the force applied, so the greater the force, the greater the speed of the object in the direction of the force. Mass is inertia, which is the reluctance to accelerate, so for the same force, more massive objects experience smaller acceleration than less massive objects.
Thus, the weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.
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The rate of effusion of substance A is 3 times the rate of effusion of substance B. If the molar mass of substance A is 4.00 g/mol, what is the molar mass of substance B?
The rate of effusion of substance A is 3 times the rate of effusion of substance B, and molar mass of A is 4g/mol, then molar mass of B is 36g/mol.
Graham Law:
The rate of effusion of a gaseous substance is inversely proportional to the square root of its molar mass. This is called Graham's Law
R = k/√M
where k is constant and m is molar mass of the substance.
rate of effusion of substance A is 3 times the rate of effusion of substance B.
molar mass of substance A is 4.00g/mol
Ra = 3Rb
Ra/Rb = √Mb/√Ma
3Rb/Rb = √Mb/√4
3 = √Mb/2
√Mb = 6
Mb = 36
so, molar mass of substance B is 36g/mol.
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how are windbelts formed Please answer ASP its 30 points!!
Answer:due to unequal heating
Explanation:
a tank at is filled with of sulfur hexafluoride gas and of dinitrogen difluoride gas. you can assume both gases behave as ideal gases under these conditions. calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. be sure your answers have the correct number of significant digits. sulfur hexafluoride mole fraction: partial pressure: dinitrogen difluoride mole fraction: partial pressure: total pressure in tank:
The mole fraction of sulfur hexafluoride gas X(SF₆) = 0.361 and the mole fraction of dinitrogen difluoride gas X(N₂O) = 0.639
moles of each gas
n = m / M
where,
n: moles and m: mass, M: molar mass
SF₆: 16.7 g / 146.06 g/mol = 0.114 mol
N₂O: 8.88 g / 44.01 g/mol = 0.202 mol
The total number of moles is 0.114 mol + 0.202 mol = 0.316 mol
To calculate the mole fraction of each gas
X = moles of gas / total number of moles
X(SF₆) = 0.114 mol / 0.316 mol = 0.361
X(N₂O) = 0.202 mol / 0.316 mol = 0.639
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list at least Three chemical reactions that occur in making bread
Explanation:
Fermentation: When yeast is added to the dough, it begins to ferment the sugars present in the dough, producing carbon dioxide and ethanol. The carbon dioxide helps to leaven the dough, while the ethanol is mostly evaporated during baking.
Maillard reaction: During baking, the heat causes a reaction between the amino acids and sugars in the dough, producing a wide range of compounds that give bread its characteristic flavor and aroma. This reaction is known as the Maillard reaction.
Protein denaturation: The heat of baking causes the proteins in the dough to denature, or lose their native conformation. This helps to give bread its texture and structure, and also contributes to the development of its crust.
__________ is a pulling force. Atmospheric pressure also acts as a force on objects
Answer:
Gravity
Explanation:
Describe where the error (if any) is in the following orbital diagram. If there is an error, be sure to include the name of the rule and how to correct it. It is okay that the orbital diagram is horizontal- this is a space saver (energy increases to the right).
The electrons in an atom are depicted in orbital diagrams in visual form. For creating orbital diagrams, three rules are helpful.
What is Orbital diagram?Each electron resides in the orbital with the , in accordance with the Auf Bau Principle.
According to the Pauli Exclusion Principle, an orbital can hold no more than two electrons. According to Hund's rule, electrons enter various orbitals within a single sub-level before doubling up within orbitals.
We have seen how the quantity and kind of valence electrons play a crucial role in establishing the chemical characteristics of a specific element. Due to their propensity to lose their single valence, Group 1A metals are extremely reactive.
Therefore, The electrons in an atom are depicted in orbital diagrams in visual form. For creating orbital diagrams, three rules are helpful.
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Draw the Lewis structure for XeF2 in the window below and then answer the questions that follow. с P opy aste []* С ChemDoodle Is XeF2 polar or nonpolar?
If XeF2 is polar or nonpolar based on the Lewis Structure and the molecular geometry (shape).
What is nonpolar?A nonpolar molecule has no separation of charge, so no positive or negative poles are formed. In other words, the electrical charges of nonpolar molecules are evenly distributed across the molecule. Nonpolar molecules tend to dissolve well in nonpolar solvents, which are frequently organic solvents.In a polar molecule, one side of the molecule has a positive electrical charge and the other side has a negative electrical charge. Polar molecules tend to dissolve well in water and other polar solvents.There are also amphiphilic molecules, large molecules that have both polar and nonpolar groups attached to them. Because these molecules have both polar and nonpolar character, they make good surfactants, aiding in mixing water with fats.To learn more about molecules refer to:
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what special equipment did niels bohr use to develop his atomic model?
Neil Bohr used the fluorescent screen and an alpha particle detector to study the structure of an atom.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
The atom as a whole is neutral and stable due to presence of oppositely charged particles.
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Draw the electron pair geometry for sulfur tetrafluoride, SF4, . What the name of the molecular shape of sulfur tetrafluoride
Answer: The hybridization that is involved in SF4 is sp3d type. Here will learn and understand how to determine SF4 hybridization. We will discuss the steps in detail.
Name of the Molecule Sulphur Tetrafluoride
Molecular Formula = SF4
Hybridization Type = sp3d
Bond Angle = 102o and 173o
Geometry = see-saw
Explanation:
In order to determine the hybridization of sulphur tetrafluoride, you have to first understand its Lewis structure and the number of valence electrons that are present. The SF4 molecule consists of a total of 34 valence electrons. Here 6 will come from sulphur and each of the four fluorine atoms will have 7 electrons.
During the formation of SF4, the sulphur atom will form bonds with each of the fluorine atoms where 8 valence electrons are used. Meanwhile, the four fluorine atoms will have 3 lone pairs of electrons in their octet which will further utilize 24 valence electrons. In addition, two electrons will be kept as lone pairs in the sulphur atom. Now we can determine sulphur’s hybridization by taking a count of the number of regions of electron density.
When bonding takes place there is a formation of 4 single bonds in sulphur and it has 1 lone pair. Looking at this, we can say that the number of regions of electron density is 5.
EXTERNAL LINKS :
https://www.chemtube3d.com/vseprshapesf4/
https://geometryofmolecules.com/sf4-lewis-structure-polarity/
For a laboratory exercise in class, a student is given a mixture of small pieces of iron, sand, water, and salt. what physical property could be used to best separate the iron from the other ingredients?
a. Solubility
b. Magnetism
c. Melting Point
d. Electrical Conductivity
Answer:
solubility
Explanation:
the solid substances will be added to water to see which one is soluble
How many moles of chlorine are present in 3 moles of MgCl2
The amount, in moles, of chlorine that would be present in 3 moles of [tex]MgCl_2[/tex] would be 6 moles.
Stoichiometric problem[tex]MgCl_2[/tex] is made from magnesium and chlorine molecules according to the following equation:
[tex]MgCl_2 --- > Mg^{2+} + 2Cl^-[/tex]
From the above equation, 1 mole of [tex]MgCl_2[/tex] is made up of 1 mole of Mg and 2 moles of Cl.
Following this established ratio, the amount of chlorine that would be present in 3 moles of [tex]MgCl_2[/tex] can be calculated as follows:
1 mole [tex]MgCl_2[/tex] = 2 moles of Cl
3 moles [tex]MgCl_2[/tex] = 2 x 3/1
= 6 moles of Cl
In other words, 6 moles of Cl would be present in 3 moles of [tex]MgCl_2[/tex].
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An atom has 8 protons, 8 neutrons, and 10 electrons.
What is the mass of this atom?
16 is the mass of this atom.
The Oxygen (O) has an atomic number of 8 and has a mass number of 16. Upon accepting 2 electrons it becomes O2-. The mass number is defined as the sum of the number of protons and neutrons present in the molecule. So here for O2- it contains 8 protons,8 neutrons and 10 electrons.
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what quantity is needed to convert between the moles of a given sample of a substance and its mass in grams
The molar mass of the substance is needed to convert between the moles of a given sample of a substance and its mass in grams.
What is molar mass?A compound's molar mass, which is measured in grams per mole, specifies how much of a given material weighs in one mole. In other terms, the molar mass is the sum of the masses of all the atoms that make up a mole of a certain molecule, expressed in grams. As a result, the molar mass is measured in grams/mole.
The compound's molar mass is expressed in grams per mole, or g/mol. The mass of 1 mol, expressed in the SI as g/mol, is the definition of the molar mass. Example: Water has a molar mass of 18.016 g/mol.
Thus, The molar mass of the substance is needed to convert between the moles of a given sample of a substance and its mass in grams.
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The complete question is as follows:
What quantity is needed to convert between the moles of a given sample of a substance and its mass in grams?
a the molar mass of the substance
b the density of the substance
с the physical state of the substance
d all of the above
How many liters (L) of water need to be added to prepare 1000mL of 0.3M NaCl from a 5M NaCl stock solution?
The amount of water needed to be added to prepare the solution would be 0.94 liters.
Dilution problemWhen diluting solutions, the number of moles of solutes before dilution must be equal to the number of solutes after dilution. The only thing that changes are the volume and concentration.
Thus, the equation of dilution is:
[tex]m_1v_1[/tex] = [tex]m_2v_2[/tex]
Where
[tex]m_1[/tex] is molarity before dilution[tex]v_1[/tex] is volume before dilution[tex]m_2[/tex] is molarity after dilution[tex]v_2[/tex] is volume after dilutionIn this case:
[tex]m_1[/tex] = 5 M, [tex]m_2[/tex] = 0.3 M, and [tex]v_2[/tex] = 1000 mL
Substituting:
5[tex]v_1[/tex] = 0.3 x 1000
[tex]v_1[/tex] = 300/5
= 60 mL
This means that the volume of the stock solution to be taken is 60 mL. The amount of water to be added would then be:
1000 - 60 = 940 mL
940 mL = 0.94 L
In other words, the amount of water needed to be added to prepare 1000 mL of 0.3M NaCl from a 5 M NaCl stock solution is 0.94 L.
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Determine whether each of the examples represents a colligative property or non colligative property
1. freezing point depression
2. density
3. boiling point elevation
4. vapor pressure lowering
5. colour
a. colligative
b. non colligative
c. colligative
d. colligative
e. non colligative
Colligative qualities include boiling point elevation, freezing point depression, and vapor pressure reduction. Color and density are non-colligative qualities.
Colligative qualities are those that rely on the number of particles of solute rather than the composition of the solute.
An example of a colligative property:
Reduced vapor pressure
Boiling point at an elevation
a drop in the freezing point
The osmotic pressure
Non-colligative qualities are those that are determined by the nature of the solute and solvent.
Non-colligative qualities include:
Viscosity
The surface tension
Density
Solubility
As a result, we may deduce that boiling point elevation, freezing point depression, and vapor pressure reduction are all colligative qualities. Color and density are also non-colligative qualities.
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a 1.50 g sample of hydrocarbon undergoes complete combustion to produce 4.40 g of co2 and 2.70 g of h2o. what is the empirical formula of this compound? in addition, its molecular weight has been determined to be about 78. what is the molecular formula?
the empirical composition of this substance Its molecular weight has also been calculated to be around 156.
the molecular equation Response: CGHG.
Calculate the grams of carbon and hydrogen in 4.40 g of CO2 and 2.70 g of H2O, respectively.
4.40 g x (12.011 g/44.0098 g) = 1.20083 g of carbon
2.70 g times (2.0158 g / 18.0152 g) Equals 0.3021482 g of hydrogen
2) Calculate the corresponding number of moles from the grams of C and H molecular weight..
20083 g / 12.011 g/mol = 0.09998 mol of carbon
In terms of hydrogen, 0.3021482 g / 1.0079 g/mol equals 0.2998 mol
3) To break up the molar amounts listed above into smaller, more manageable amounts, divide each one by its lowest value.
numbers.
0.09998 mol/0.09998 mol = 1 for carbon.
hydrogen: 0.298 mol/0.0998 mol = 2.9986 mol = 3
We have now discovered the solution: the substance's empirical formula is CGHG
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compare the temperature changes in the stratosphere with those in the thermosphere. Include the role of ozone in your explanation
The stratosphere, which can be found above the troposphere and below the mesosphere, is the second layer of the Earth's atmosphere (/straetsfr, -to-).
What is stratosphere?The stratosphere is an atmospheric layer that is made up of stratified temperature levels, with the warm layers of air high in the sky and the cool layers of air low in the sky, near the surface of the Earth. The ozone layer's ability to block the sun's ultraviolet (UV) radiation is what causes temperatures to rise with altitude. As opposed to the troposphere, which is close to the Earth's surface, where temperature drops with height, the temperature inversion is a phenomenon.The tropopause border, which separates the temperature inversion from the troposphere, is located between the two layers of the atmosphere.The lower stratosphere can reach heights of 20 km (66,000 ft; 12 mi) close to the equator, 10 km (33,000 ft; 6.2 km) in midlatitudes, and roughly 7 km at the poles (23,000 ft; 4.3 mi). Temperatures range from a mean of 51 °C (60 °F; 220 K) near the tropopause to a mean of 15 °C (5.0 °F; 260 K) towards the mesosphere. The stratosphere's temperatures also alter with the seasons, dropping to especially low levels during the polar night (winter). In the Southern polar vortex, stratospheric winds can reach speeds of up to 60 m/s (220 km/h; 130 mph), significantly exceeding those in the troposphere.To Learn more About stratosphere, refer To:
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aluminum metal reacts with chlorine gas to form aluminum chloride the reaction starts with 3 g of chlorine gas and unlimited supply of aluminum, how many grams of aluminum chloride can be formed?
The aluminum metal reacts with chlorine gas to form aluminum chloride the reaction starts with 3 g of chlorine gas , grams of aluminum chloride formed is 3.73.
The balanced reaction is given as :
2Al + 3Cl₂ ----> 2AlCl₃
mass of Cl = 3 g
molar mass of Cl₂ = 71 g/mol
moles of Cl₂ = mass / molar mass
= 3 / 71
= 0.0422 mol
3 mole of Cl₂ produces 2 moles of AlCl₃
0.0422 mol of Cl₂ = (2/3) 0.0422
= 0.028 mol of AlCl₃
mass of AlCl₃ = molar mass × moles
= 133.34 × 0.028
= 3.73 g
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Khloe is preheating her oven before using it to bake. Khloe wants to predict the final temperature after xx minutes. She wrote the equation y=20x+78y=20x+78, where yy represents the final temperature in degrees fahrenheit. What is the meaning of the yy-value when x=1x=1?.
The final temperature of the oven after being preheated, y is 98 degrees Fahrenheit.
What is the relationship between the final temperature and the time taken to preheat the oven?The relationship between the final temperature, y, and the time taken to preheat the oven, x is given by the equation below:
y = 20x + 78
where;
the final temperature is y,
and the time taken to preheat the oven is x
When x is equal to 1, the value of y can be determined as follows:
y = 20 (1) + 78
y = 98 degrees Fahrenheit.
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ANSWER ASAP FOR 90 POINTS Question: Air pressure is...
A.high and low at the bottom
B. same at the top same at the bottom
C.low at the top low at the bottom
D.low at the top hight at the bottom
Air pressure is D.low at the top hight at the bottom.
How much air pressure is typical?Pressure is the force that the air applies to the ground when gravity acts on it. At sea level, there is typically a pressure of 1013.25 millibars, or 14.7 pounds per square inch.
When the air pressure is high, what happens?High pressure frequently heralds sunny, dry weather. Clouds and precipitation are frequently indicative of low pressure. Air that is sinking is related with high pressure. Because it is pushing DOWN on the ground, air pressure is higher.
How do we react to air pressure?High barometric pressure exerts additional pressure against our bodies, which restricts how much tissue can expand. On the other hand, when air pressure is low, our body's tissues can expand more, which results in more pressure.
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a housewife used the aluminum can to keep vinegar. After sometime, it is found that the vinegar is spoiled. Give a reason.
Answer:
Explanation:She was wrong
Dna has an important role in making proteins, the biomolecules that help determine our traits as well as take part in chemical reactions throughout our bodies. Can you correctly label the steps/parts involved in protein synthesis?.
Protein synthesis is a process that is generated within cells where different organelles and genetic components are involved through which proteins are generated.
What are the steps of protein formation?The biosynthesis of proteins will be given by different parts, beginning with the translation of the genetic material. It will be given by different steps:
1. mRNA binds to ribosomes and the aminoacyl-tRNA to be associated to the first codon of the mRNA is associated.
2. The elongation of the polypeptide chain occurs, in which the amino acids are joined
3. The elongation is finished when the termination codons are reached.
4. The translation components are released and post-translational modifications are started.
5. The folding, glycosylation and modification of amino acids occur
6. Finally, the protein is released to generate its function
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. n specifies fill in the blank 4 l specifies fill in the blank 5 ml specifies fill in the blank 6 ... a.the orbital orientation. b.the energy and average distance from the nucleus. c.the subshell - orbital shape.
n specifies B. The energy and average distance from the nucleus, l specifies C. The subshell - orbital shape, ml specifies A. The orbital orientation.
n is known Principal quantum number
l is known Azimuthal quantum number
ml is known Magnetic quantum number
The energy and usual distance from the nucleus are described by the fundamental quantum number, or n.
The subshell and orbit's shape are described by the orbital quantum number, or l.
The orbit's direction is described by the magnetic quantum number, ml.
So, n specifies B. The energy and average distance from the nucleus.
l specifies C. The subshell - orbital shape.
ml specifies A. The orbital orientation.
Thus, n specifies B., l specifies C., ml specifies A.
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✔ Question 1
Below is a picture of the rock strata of a mountain.
What can you infer about the layers in this picture?
Sedimentary rock layers are referred to as rock strata.
What is a rock?A rock is a dense mass of mineral grains that have grown or been cemented together over time. There are big rocks and little rocks. Pebbles are little rocks.
The sediment grains that are deposited by water, wind, or ice become sedimentary rocks. They are always formed in layers and are referred to as "beds" or "strata," and frequently include fossils.
Weathering, erosion, deposition, compaction, and cementation are the processes that result in the formation of these horizontal layers. Newer layers are deposited and created during this process on top of older layers, allowing for the relative dating of each layer.
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A btu is defined as the amount of energy required to raise the temperature of one lb of water by one degree celsius.
a. True
b. False
Answer:One BTU is defined as the amount of energy required to raise the temperature of 1 lb of water through 1 degree Fahrenheit
Explanation:
A student wants to determine the effect of a fertilizer on the growth of bean plants. She sets
up the following experiment.
Bean
Soil
Fertilizer
Daily water 50 mL
A
Bean
Soil
Daily water 50 mL
2. What does setup "B" represent and why is it important in this experiment?
ANSWER QUESTION 2 NOT QUESTION 1
The experimental set up in B is to observe the growth the green beans without the addition of fertilizer. Thus, we can compare the growth of the plant with and without fertilizer and thereby we can understand the effect the fertilizer on the plant growth.
What is fertilizer?Fertilizers are chemical substances used to nourish the plants by making the soil rich in nutrients and minerals. Plants needs minerals along with water such as potassium, calcium, phosphorous, nitrogen etc.
Sometimes the soil comes deficient of these minerals and we have to fertilize the soli by the addition of the chemicals containing these minerals. Hence, fertilizers provide a nutrient rich soil for plant growth.
The experimental set up with fertilizer added plant and the second one (B) without fertilizer helps to compare the growth in both conditions and we can clearly understand how fertilizers effect the growth of plants by comparing the plant growth in A and B.
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a chemist reacted 0.20 moles 4-aminophenol (109.13 g/mol) with 0.25 moles of acetic anhydride (102.09 g/mol) to synthesize acetaminophen. if 22 g acetaminophen (151.163 g/mol) was generated, what was the percent yield of the reaction? (only type the number, not the percent sign)
If 22 g acetaminophen (151.163 g/mol) was generated. The percent yield of the reaction is 72.78 %.
Calculation :
C₆H₇NO + C₄H₆O₃ --> C₃H₉NO₂ + C₂H₄O₂
0.20 moles 0.25 moles 22g
limiting reagrnt --> C₆H₇NO
from reaction equation
.20 mol of acetaminophen = .20*151.163 = 30.23 g
% yield = (practical/ theoritical)yield* 100 = 72.78 %
reaction yield. The reaction yield (absolute yield) of a chemical reaction is the amount of pure, dry product recovered from the reaction. Relative yield or percent yield (%) is commonly calculated to measure the efficiency of chemical reactions in organic synthesis.
Yield, also called reaction yield, is a measure of the molar amount of product to reactant consumed in a chemical reaction, usually expressed as a percentage. Yield is one of the main factors that scientists must consider in organic and inorganic chemical synthesis processes. [2] In chemical reaction engineering, “yield,” “conversion,” and “selectivity” relate to unwanted products, how much of the starting material is consumed (conversion), how much of the desired production A term used to describe the rate at which something is formed (yield). (selectivity) represented as X, Y, and S
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please help!
Are magnesium and calcium more reactive with oxygen in the air than is aluminum? Support your answer.
Magnesium and calcium are 2nd group elements with 2 valence electrons. They are metals in room temperature and easily lose these electrons to nonmetals such as oxygen.
What is magnesium ?Magnesium is 12th element in periodic table. It is 2nd group element and is a called alkaline earth metals. Its group members are calcium, strontium, and barium.
They contains 2 valence electrons which can be easily lost to a non-metal. Oxygen is highly electronegative element and it contains 6 valence electrons and need two more electrons to achieve octet.
Al is 13th group element it is not as much electropositive as alkaline earth metals. It contains 3 valence electrons and thus it need to lose all these 3 electrons to achieve octet. Hence, Al is less reactive towards O2 in comparison with Mg and Ca.
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what is the form of energy contained in a dam called? group of answer choices nuclear chemical kinetic potential
Potential Energy is the form of energy contained in dam.
Total energy:
The total energy of each considered object is the sum of its potential energy (P.E) and kinetic energy (K.E) and is constant throughout motion. For example, at finite height, a ball has maximum potential energy and zero kinetic energy, and when released, K.E increases and becomes maximum at ground level, and P.E decreases to zero at ground level. , so the total energy increases. There is movement of the ball in the same way everywhere. The energy that an object has due to its motion is called kinetic energy, and the energy that an object has due to its position and shape is called potential energy.
Here the water dammed by the dam has a certain potential height. This means that water has latent energy because it is located far from the bottom. Therefore, water dammed up by a dam has potential energy.
Potential Energy:
In physics, potential energy is the energy possessed by an object due to its position relative to other objects, its own tension, electrical charge, or other factors. Common types of potential energy are the gravitational potential energy of a body, the elastic potential energy of an extended spring, and the electrical potential energy of an electric charge in an electric field. The unit of energy in the International System of Units (SI) is the joule, and the symbol is J.
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Which of the following is an example of a heterogeneous mixture?
salad
milk
paint
toothpaste
Answer:
salad
Explanation:
