The combination of alloys 1 and 5 would give the largest temperature-sensitive deflection for your bimetallic temperature sensor design. Thus, the correct option is C.
A bimetallic temperature sensor works by using two different metals with different thermal expansion coefficients that are bonded together. When the temperature changes, one metal will expand more than the other, causing the bond to bend. To achieve the largest temperature-sensitive deflection, it is important to use two metals with the largest possible difference in thermal expansion coefficients.
In this case, alloys 1 and 5 have the largest difference, with thermal expansion coefficients of 25 m/m-K and 2 m/m-K respectively, resulting in the largest deflection and making it the most suitable combination for a temperature sensor design.
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An iron ore sample contains Fe2O3 plus other impurities. A 759-g sample of impure iron ore is heated with excess carbon, producing 467 g of pure iron by the following reaction.
Fe2O3(s) + 3 C(s) → 2 Fe(s) + 3 CO(g)
What is the mass percent of Fe2O3 in the impure iron ore sample? Assume that Fe2O3 is the only source of iron and that the reaction is 100% efficient.
Fe2O3(s) + 3 C(s) → 2 Fe(s) + 3 CO(g) an iron ore sample contains Fe2O3 plus other impurities. A 759-g sample of impure iron ore is heated with excess carbon, producing 467 g of pure iron. The mass percent of Fe2O3 in the impure iron ore sample is 38.40 %.
What is mass percent ?The ratio of the mass of the solute present in a solution to the mass of the solution as a whole is known as the mass percent.
The lowest whole number of moles and the proportional number of atoms of each element in a compound are both indicated by this formula. Chemists can also determine the actual molecular formula using the empirical formula. The precise number of atoms in the compound is indicated by this formula.
Given:
Weight of sample- 759 kg.
Weight of iron- 467 kg.
Weight of Fe2O3 = 467 × 159.69 / 255.85
= 291.5
% of Fe2O3 = 291.5 / 759 × 100
= 38.40 %
Thus, The mass percent of Fe2O3 in the impure iron ore sample is 38.40 %.
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Calculate how many parts of each ingredient are needed for the following medication order: Prepare a lidocaine 2% cream using a lidocaine 1% cream and alidocaine 5% cream 1 parts of 5%, 3 parts of 1%
We need 25 g of the 2% cream, which contains 1 part of the 5% cream (0.05x g = 1.25 g) and 3 parts of the 1% cream (0.03 x g = 0.75 g).
Let's say we need x g of the 2% cream.
The amount of lidocaine in the 1% cream is x × 1% = 0.01 × g.
The amount of lidocaine in the 5% cream is x × 5% = 0.05 × g.
Since we need 1 part of the 5% cream and 3 parts of the 1% cream, the total amount of lidocaine in the 5% cream is 1 × 0.05 × g = 0.05 × g.
The total amount of lidocaine in the 1% cream is 3 × 0.01 × g = 0.03 × g.
The total amount of lidocaine in the 2% cream is 0.05 × + 0.03 × = 0.08 ×g, which is equal to 2% of the total mass of the cream, so 0.08 × = 2% × x.
Dividing both sides by 0.08, we get x = 2 / 0.08 = 25 g.
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"What is the mass of a gold bar that is 7.379 × 10–4 m3 in volume? The density of gold is 19.3 g/cm3."
Write your answer to 3 significant figures
Answer:
The volume of an object is the amount of space it takes up. In this question, we know that the volume of the gold bar is 7.379 x 10^-4 m^3. We also know that the density of gold is 19.3 g/cm^3. To calculate the mass of the bar, we need to multiply the density of gold by the volume of the bar. The mass will be in grams.
Density = mass / volume
mass = density * volume
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3)
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3) * (10^6 cm^3/m^3)
mass = 140.4 g
So the mass of the gold bar is 140.4 g (rounded to 3 significant figures)
Find the Compound Formula
Cation: Cu+
Anion: S2-
Formula =
Cation: Ni2+
Anion: F-
Formula =
Cation: Cr3+
Anion: Cl-
Formula=
I'm struggling so much with understanding how to get the compound formula. Please leave and explanation and thank you
Answer:
Explanation:
Cu⁺ and S²⁻
You know the charge on copper is +1 and the charge on sulfur is -2. Use the "swap and drop" method to write the formula.
Swap the numbers and then drop them as the subscript for each element. Place the 2 as the subscript on copper and 1 as the subscript on sulfur.
Cu¹⁺ S²⁻
Cu₂S₁
Since we do not write the subscript when it is 1, do not use S₁. Use the formula shown below.
Formula = Cu₂S
You will use the same method to answer the other questions.
Ni²⁺ F¹⁻
Formula = NiF₂
Cr³⁺ Cl¹⁻
Formula = CrCl₃
which of the following statements describes a lewis acid-base reaction correctly?multiple choice question.the base removes a h from the acid.the acid donates an electron pair to the base.the acid donates a h to the base.the base donates an electron pair to the acid.
The following statement that correctly describes a Lewis acid-base reaction is that the base donates an electron pair to the acid.
What is the acid-base?Acid-base is a chemical reaction involving acid and base reactants. It can be used in determining the pH.
According to Lewis, an acid is a substance that accepts an electron pair. While a base is a substance that donates or donates electron pairs. The electron transport causes acids and bases to react, resulting in a coordinated covalent bond.
Lewis's acid-base theory is able to explain the acid-base properties of molecules or ions that have lone pairs of electrons or that can accept lone pairs of electrons, such as in the formation of complex compounds.
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How many moles of CaSO4 are required to produce 128 g of SO2? 3CaSO4 + CaS → 4CaO + 4SO2
2 moles of CaSO4 are required to produce 128 g of SO2 in 3CaSO4 + CaS → 4CaO + 4SO2 in this equation.
What do you mean by mole ?The term mole is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
1 mole = 6.023 × 10²³ molecules
The balance equation is as follows:
3CaSO4 + CaS → 4CaO + 4SO2
1 mole = 6.023 × 10²³ molecules
1 mole SO₂ = 6.023 × 10²³ molecules
128 mole = ?
Molar mass of SO₂ = 64 gram
The numbers of moles in 128 gram SO₂ = 1 / 64 ×128
= 2 moles
Thus, 2 moles of CaSO4 are required to produce 128 g of SO2.
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create an experiment for yourself to do at
home today that involves 2 different types of fats. This could be toast with 2 different types of butter or
try different types of chips that are made using different oils or none at all like a baked chip. Then
describe the trinity of sensation that you notice using your senses of sound, taste, and feel. If you don't
have anything handy around the house, do your best to recall 2 things that are familiar to you.
Monounsaturated and polyunsaturated fats are among the best types of fats. Among the bad ones are trans fats produced industrially. The middle ground belongs to saturated fats.
Which kinds of fats are there?Food has four types of significant dietary fats, Transfats, monounsaturated fats, and polyunsaturated fats are all types of fat.Monounsaturated and polyunsaturated fats are among the best types of fats. Among the bad ones are trans fats produced industrially. The middle ground belongs to saturated fats.Monounsaturated and polyunsaturated fats, which are considered "good" fats, reduce the risk of disease. Vegetable oils, nuts, seeds, and fish are among the foods high in healthy fats. Examples include olive, canola, sunflower, soy, and maize oils.Atherosclerosis can be brought on by fatty deposits in blood vessels caused by saturated fats, including a form known as trans fat, which have a tendency to solidify ("hardening of the arteries"). In contrast, unsaturated fats are more unlikely to block your arteries since they remain liquid at room temperature.To learn more about fats refer to:
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What is the work associated with decomposition of trinitrotoluene (TNT) upon detonation according to the following reaction at 279.65 K ?
C7H5N3O6(s)⟶32N2(g)+52H2(g)+3O2(g)+7C(s)
The work associated with the decomposition of TNT upon detonation can be determined by using the First Law of Thermodynamics.
What is the first law of thermodynamics?According to the First Law, the change in internal energy (ΔU) of a system is equal to the heat added to the system (q) minus the work done by the system (w).
In this case, the reaction is exothermic and heat is released, meaning that q is negative. The work done by the system can be calculated using the equation:
w = -PΔV
where P is the pressure and ΔV is the change in volume is used to calculate the work done by the system.
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which of the following atoms has five valence electrons? A. magnesium (mg) B. sulfur (s) C. silicon (si) D. nitrogen (n)
D. nitrogen (n)
Explanation:The periodic table shows all known elements and puts them into groups, also known as families.
Valence Electrons
Valence electrons are electrons found on the outermost energy level. This means that they are farther from the nucleus than other electrons. Valence electrons are the electrons that are involved in both covalent and ionic bonding. Atoms become an ion when they gain or lose valence electrons.
Main Families
All of the elements listed are in a main family. This means they are either from groups 1, 2, 13, 14, 15, 16, 17, or 18. If you look at a periodic table, these are the taller groups. Note that transition metals are not considered to be a main group.
For all elements within main groups, their number of valence electrons can be found through their group number (with the exception of He due to its small size).
Counting Valence Electrons
For groups 1 and 2, the number of valence electrons is equal to the group number. For example, Mg is in group 2 and has 2 valence electrons. Na is in group 1 and has 1 valence electron.
For groups 13-18, the number of valence electrons is equal to the group number minus 10. For example, O is in group 16 and has 6 valence electrons.
Group 15
The rules above tell us that any element in group 15 will have 5 valence electrons. Group 15 is also known as the nitrogen group because it is the first element listed. So, we know that nitrogen is in group 15. This tells us that nitrogen must have 5 valence electrons.
In general, the materials termed 'composites' and 'ceramics' have______ arrangement of their atoms.
A. Orderly
B. Amporphus
C. Lined-up
D. Branched
In general, the materials termed 'composites' and 'ceramics' have amporphus arrangement of their atoms and is therefore denoted as option B.
What is Amorphous structure?
This is referred to as a type of matter which could be solid, liquid, gas that lacks regular long-range order within its atomic structure. It is also referred to as any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern.
Examples of this type of materials are composites and ceramics which is therefore the reason why option B was chosen as the correct choice.
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How many MOLES of carbon tetrachloride are present in 3.70 grams of this compound ?
Answer: there are 0.024 moles of CCl4 present in 3.70 grams of this compound
Explanation: To determine the number of moles of a compound present in a given mass, we can use the formula:
moles = mass / molar mass
where molar mass is the mass of one mole of the compound and is measured in g/mol.
The molar mass of carbon tetrachloride (CCl4) is 153.82 g/mol.
So to find the number of moles of CCl4 present in 3.70 grams, we can plug in the values into the formula:
moles = 3.70 g / 153.82 g/mol
moles = 0.024 mol
Therefore, there are 0.024 moles of CCl4 present in 3.70 grams of this compound.
What is the Arrhenius acid and what is the Arrhenius base in the acid-base reaction HI + CsOH CsI + H2O
Answer:
Arrhenius acids produce H^+ in solution. Wouldn't HI be an Arrhenius acid?
HI ==> H^+ + I^-
Arrhenius bases produce OH^- in solution? Wouldn't that be CsOH?
CsOH ==> Cs^+ + OH^-
Arrhenius acid: HI (hydrogen iodide) and Arrhenius base: CsOH (cesium hydroxide).
In the acid-base reaction HI + CsOH → CsI + H₂O, hydrogen iodide (HI) is the Arrhenius acid, and cesium hydroxide (CsOH) is the Arrhenius base.
According to the Arrhenius theory of acids and bases, an acid is a substance that produces hydrogen ions (H⁺) when dissolved in water. In this reaction, HI dissociates in water to form H⁺ ions and iodide ions (I⁻):
HI → H⁺ + I⁻
On the other hand, a base is a substance that produces hydroxide ions (OH⁻) when dissolved in water. CsOH dissociates in water to produce Cs+ ions and OH⁻ ions:
CsOH → Cs⁺ + OH⁻
When the two reactants, HI and CsOH, are combined, they undergo a neutralization reaction. The H⁺ ion from the acid combines with the OH⁻ ion from the base to form water (H₂O):
H⁺ + OH⁻ → H₂O
The remaining ions, Cs⁺ and I⁻, combine to form the salt cesium iodide (CsI):
Cs⁺ + I⁻ → CsI
Thus, in the overall reaction, the Arrhenius acid HI donates an H⁺ ion, and the Arrhenius base CsOH donates an OH⁻ ion, leading to the formation of water and the salt CsI. This reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water.
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What is the density of copper if 4.80 cm³ has a mass of 43.0 g? Please report your answer to the correct
amount of significant figures.
g/cm³
Answer: d = 0.958 g/cm³
Explanation:
Density = mass/volume
d = g/cm³ or d = g/mL
Note: cm³ = mL
d = 43.0 g/4.80 cm³
d = 8.96 g/cm³
Three significant figures are in the final answer since there are three significant figures in 4.80 cm³ and 43.0 g.
Construct a response below where you answer the following questions and explain the photosynthesis process. a. What special structures within a plant help it during photosynthesis? b. What energy conversion occur during photosynthesis? Make sure to use the following words in your explanation: water, light energy, glucose, carbon dioxide and oxygen
Photosynthesis is a process by which plants produce their own food using light energy, carbon dioxide, and water. The special structures within a plant that help it during photosynthesis are called chloroplasts. These chloroplasts are found within the mesophyll cells of leaves and contain chlorophyll, which absorbs light energy from the sun.
What is photosynthesis?Generally, During photosynthesis, light energy is converted into chemical energy by the chlorophyll within the chloroplasts. Water is taken in by the roots and transported to the leaves where it is used in the process. Carbon dioxide from the air is also taken in through tiny pores called stomata on the leaves.
The light energy from the sun is used to split the water molecules into hydrogen and oxygen, releasing oxygen into the air as a byproduct. The hydrogen ions are then combined with carbon dioxide to form glucose, which is the plant's food source.
In summary, the photosynthesis process converts light energy, water, and carbon dioxide into glucose and oxygen. This process is essential for the survival of plants and also provides the basis of the food chain for all living things.
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A+B _ 2c find Kc and initial concentration
Calculate and record the following data in the table. Name Propane Butane Methane
Molar volume (L/mol) _____ _____ _____
Average molar volume (L/mol) _______________________
Propane molar volume: ______ L/mol butane molar volume: ______ L/mol
The molar volume and average molar volume of propane, butane, and methane at STP are 24.45 L/mol , 24.93 L/mol ; 28.02 L/mol , 24.93 L/mol and 22.41 L/mol , 24.93 L/mol respectively.
The molar volume of a gas is defined as the volume occupied by one mole of gas at standard temperature and pressure (STP), which is defined as 0°C and 1 atm.
The molar volume of a gas can be calculated using the ideal gas law,
PV = nRT,
where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature in kelvins.The molar volumes of propane, butane, and methane at STP can be calculated as follows:
Propane: C₃H₈
At STP (0°C and 1 atm), the molar volume of propane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 24.45 L/mol
Butane: C₄H₁₀
At STP (0°C and 1 atm), the molar volume of butane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 28.02 L/mol
Methane: CH₄
At STP (0°C and 1 atm), the molar volume of methane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 22.41 L/mol
The average molar volume is the sum of the molar volumes divided by the number of gases:
Average molar volume = (24.45 + 28.02 + 22.41) / 3
Average molar volume = 24.93 L/mol
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A marshmallow has an initial volume of 0.068 L at standard pressure (1.0
atm). If the marshmallow is placed in a vacuum chamber and the final
volume is 0.296L, what is the pressure inside the chamber?
Answer: 0.232 atm
Explanation:
The pressure inside the chamber can be calculated using the Ideal Gas Law, which states that PV = nRT.
P = pressure (atm)
V = volume (L)
n = number of moles (assumed to be constant)
R = gas constant (0.0821 L·atm/mol·K)
T = temperature (K)
Since we know the initial and final volume of the marshmallow, we can use the equation:
(P1)(V1) = (P2)(V2)
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
We can plug in the given information:
(1.0 atm)(0.068 L) = (P2)(0.296 L)
Solving for P2, we get:
P2 = (1.0 atm)(0.068 L) / (0.296 L) = 0.232 atm
So the pressure inside the chamber is 0.232 atm.
which of the following applies to a reaction where the activation energy is the same for the reverse reaction as for the forward reaction? a. ΔS for the reaction is zero · ΔH for the reaction is zero c. the reaction is zero order overall d. a catalyst is present
The one that applies to a reaction where the activation energy is the SAME for both the reverse and forward reaction is that the ΔH for the reaction is zero. Therefore, the correct answer is option B.
In chemistry, ΔH is the enthalpy change. Enthalpy itself is a property of a thermodynamic system. It is the sum of the system's internal energy. In another definition, ΔH is the amount of heat that is evolved or absorbed in a reaction that carries out at a constant pressure.
When a reaction is endothermic, the ΔH is positive. A negative ΔH means the reaction is exothermic.
In the question, the reaction goes forward AND reverse. That means the heat is both produced and absorbed, meaning that the ΔH are both positive and negative, resulting in zero ΔH.
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Classify each statement as an observation, a law, or a theory. Drag the appropriate items to their respective bins.: (A): Neon does not react with sodium at room temperature and pressure. (B): Chlorine reacts violently with sodium at room temperature and pressure. (C): If elements are listed in order of increasing mass of their atoms, their chemical reactivity follows a repeating pattern. (D): The reactivity of elements depends on the arrangement of their electrons. Observation: (A), (B) Law: (C) Theory: (D)
Observation, theory, and law all play significant roles in the philosophy of science. The statement the reactivity of elements depends on the arrangement of their electrons is a theory.
Chlorine reacts violently with sodium at room temperature and pressure and Neon does not react with sodium at room temperature and pressure are observations.
The statement, If elements are listed in order of the increasing mass of their atoms, their chemical reactivity follows a repeating pattern = law.
In most contexts, the act of sensing the exterior real objects that surround us is known as observation. Observation relies heavily on the use of many sensory organs.
A scientific explanation of a witnessed action or occurrence is an example of what we mean when we talk about theory. It provides an explanation for the observations or events that are based upon any hypothesis that has been demonstrated to be correct. A phenomenon or behavior that has been observed can be described using the term "law." It is widely accepted in most circles as a statement of fact.
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the fact that oxygen is an atom that is strongly electronegative means that group of answer choices the bond formed will always be ionic since there is unequal sharing it more strongly pulls shared electrons toward itself when forming a covalent bond with a less electronegative atom it equally pulls shared electrons toward itself when forming a covalent bond with a less electronegative atom the less electronegative atom will pull the electrons more strongly than oxygen will
The fact that oxygen is an atom that is strongly electronegative means that when forming a covalent bond with a less electronegative atom, it will pull the electrons more strongly than the less electronegative atom will, resulting in unequal sharing of electrons.
This unequal sharing of electrons means that the bond formed will always be ionic. Additionally, the ionic bond is usually the strongest type of bond, and it can be difficult to break the bond. This makes ionic bonds ideal for holding molecules together or for creating strong materials.
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A soft gel capsule contains 700 mcg of vitamin A.
If a capsule weighs 1.1 g, what percent of the capsule is vitamin A?
Express your answer using two significant figures.
Answer:
To find the percent of the capsule that is vitamin A, we need to divide the weight of the vitamin A (700 mcg) by the total weight of the capsule (1.1 g) and multiply by 100.
First, we need to convert the weight of the vitamin A from micrograms to grams:
700 mcg = 0.0007 g
Then we can use the following formula:
(Weight of Vitamin A / Total weight of capsule) x 100 = % of capsule that is Vitamin A
(0.0007 / 1.1) x 100 = 0.63 x 100 = 63%
So, 63% of the capsule is vitamin A, rounded to two significant figures.
Explanation:
Hope this helps!
Please answer my question.
When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.
What is ion?An atom or molecule is said to be an ion if a number of its electron pairs have been acquired or lost, giving it a net negative or positive electrical charge.
In other terms, a chemical species has an unbalanced ratio of proton (positively charged particles) to electrons (negatively charged particles). When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.
Therefore, when chlorine react in ionic form, it gain one electron as its electronegativity is very high.
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Approximately 12 billion kilograms of phosphoric acid (H3PO4) are produced annually for fertilizers, detergents, and agents for water
treatment. Phosphoric acid can be prepared by heating the mineral fluoroapatite (Cas(PO4)3F) with sulphuric acid in the presence of
water.
Cas(PO4)3F+5H₂SO4 + 10H₂0-3H3PO4 + 5CaSO42H₂O + HF
If every kilogram of fluoroapatite yields 386 g of phosphoric acid, what is the percent yield?
The actual yield divided by the hypothetical yield multiplied by 100 is known as percent yield. The percent yield is 68.04 %.
What is the yield in percentage?The percent yield is the difference between the actual yield and the hypothetical yield multiplied by 100.
A number of factors, which will be discussed in more detail in later chapters of the course, can cause a chemical reaction's actual yield to be lower than its theoretical yield.
The percentage yield of a chemical reaction indicates the efficiency of that reaction.
It provides us with information about the percentage of our reactants that successfully transformed into a product in terms of percentages.
[tex]Ca_5(PO_4)_3F + 5H_2SO_4 + 10H_2O $\rightarrow$ 3H_3PO_4 + 5CaSO_4.2H_2O + HF[/tex]
504.3 g 294 g
1 x 103 g ??
[tex](504.3 g ) Ca5(PO_4)_3F \rightarrow H_3PO_4 (294 g)[/tex]
1000 g [tex]Ca5(PO_4)3F \rightarrow[/tex] ??
theoretical yield of H2PO4 = "[tex]1000\ \times \frac{294}{504.3}[/tex]
= 582.986 g
actual yield = 396 g
percent yield = [tex]"\frac{396}{582}\times 100"[/tex]
="percent yield = 68.04 %"
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if ethanol is replaced by acetic acid would you expect the same change?
Explanation:
no because they have different functional group
Calculate the concentration for the following pH: pH = 13.8
A) [H3O+] = 1.0 x 10-4 M
B ) [H3O+] = 1.0 x 10-14 M
C) [H3O+] = 1.6 x 10-4 M
D) [H3O+] = 1.6 x 10-14 M
A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is the following order: zero, first, second
A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order.
What is zero order reaction ?The term zero order reaction is defined as those in which the concentration of the reactants does not change over time and the concentration rates remain constant.
Zero Order: t(1/2) = [A]o/(2*k),
Therefore, k = [A]o/(2 * t(1/2)), where t(1/2) = 100 min. and [A]o=100% So incorporate condition.
A= - .0005 x 200 mins+1 of introductory fixation approaches zero percent.
Initially Order: Half-life condition k=.00693 remaining with 100 mins half life
Coordinate condition lnx= - .00693x200mins + ln 1 squares with lnx= - 1.386.
Take to the e to counteract ln so x=.25 or 25%
Second Order Initial Concentration of 1, half-existence of 100 mins.
K= .01.
Coordinate condition 1/x = .01 x 200 +1. X
= 33.3%
Thus, A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order.
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a ball is pushed from a stop and rolls 6 m in 2 s. Student A says the average speed of the ball is 3 m/s. Student B says the average speed of the boll is 1.5 m/s. which student is correct and explain your answer
The average speed of an object is the ratio of the distance to the time. Hence, the speed of the ball rolling 6 m in 2 seconds is 3 m/s. Therefore, student A is correct.
What is average speed?Speed is a physical quantity measuring the distance covered by an object within unit time. Speed is a scalar quantity. The rate of speed is called velocity. The unit of both quantities in common is m/s.
If an object covers more distance within small time, the object is said to have a greater speed. The speed of the object is the ratio of its change in distance to the change in time.
Given that, distance covered by the ball = 6 m
time taken = 2 seconds
speed = distance/ time
speed = 6 m / 2 s= 3 m/s
Therefor, the speed of the ball is 3 m/s and student A is correct.
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determining the exact age of a fossil by using carbon dating and half-life
Answer:
you need to multiply your number of half-lives by how many years are in one half-life. This gives you an age of 2 x 5730 = 11,460 years. Your fossil is of an organism (maybe human) that died 11,460 years ago
Explanation:
D) All atoms of a given element must 3. Which statement concerning elements is true? A) electron and neutron B) electron and positron C) proton and electron D) proton and neutro nir mass unit?c
'Protons and neutrons' is the true statement concerning elements.
What is proton and neutron ?
Protons are positively charged particles with a mass of approximately 1 amu. These positively charged particles are present in the Centre of the atom in the nucleus. Neutrons are electrically neutral particles which have the same mass as a proton.
Protons: Positively charged subatomic particles that reside in the nucleus. Neutrons: Neutrally charged subatomic particles that reside in the nucleus. Electrons: Negatively charged subatomic particles found in the electron shells surrounding the nucleus.
A neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The particle derives its name from the fact that it has no electrical charge; it is neutral.
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Which is the BEST example of an adaptation of many plants found in rain forests? Responses A They produce very few seeds because too much pollination would create too much competition for survival.They produce very few seeds because too much pollination would create too much competition for survival. B They have large green leaves to absorb as much sunlight as possible as it filters through the thick rain forest canopy.They have large green leaves to absorb as much sunlight as possible as it filters through the thick rain forest canopy. C Most of them have tap roots to survive the constantly-moist environment.Most of them have tap roots to survive the constantly-moist environment. D With thousands of predators in the ecosystem, they are mostly carnivorous.
The best example of an adaptation of many plants found in rain forests is They have large green leaves to absorb as much sunlight as possible as it filters through the thick rain forest canopy.
What are adaptations of forest plants ?Every kind of organisms have their own adaptations to survive in a particular type of ecosystem. There are different types of ecosystems such as forests, deserts,, aquatic systems, grass lands etc. Each type of systems are composed of organisms with their own peculiarities.
Plants need sunlight for photosynthesis. They sometimes grow bend to reach sunlight. In rain forests , trees, shrubs and other plants are growing densely and short gap to reach sunlight.
Therefore, plants there have large green leaves to absorb as much sunlight as possible as it filters through the thick rain forest canopy. Hence, option B is correct.
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