List the properties of light that can best be explained by the wave
theory in one column. List those best explained
by the particle theory in the second column.
Answers
Answer:
Young's double slit experiment is the classic proof of the wave nature of light. In the experiment light from two sources interfere. Particles are thought to be unable to interfere, but wave interference is well established by observation.
The photoelectric effect is the experiment that challenged the prevailing view that light was a wave (established by Young as above). There are several bits of detail to the experiment that confirm that light exhibits particle behaviour. The main thing to appreciate is that the threshold frequency and instantaneous emission of electrons support a discrete nature to light.
Related Questions
A rod measures 17.2 inches.
How many centimeters is
this?
[ ? ] cm
![A rod measures 17.2 inches.How many centimeters isthis?[ ? ] cm](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/zvS2KlyWqwYCEHQGJ7ZXWo4aE4X9hEd0.png)
Answers
This problem is providing the length in inches of a rod and it is being required to convert it to centimeters. According to the following, the answer will be 43.7 cm:
Units conversion:In science, we use units conversion to represent measurements in different types of units depending on a specific requirement. To do so, we use conversion factors based on equivalence statements, relating the required unit with the given one.
In this case, the equivalence statement between inches and centimeters is 2.54 cm = 1 in and we can use it to get the answer as shown below:
\(17.2in*\frac{2.54cm}{1in} \\\\=43.7 cm\)
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What is the concentration of [oh −] in a 0. 10 m ammonia solution? ( k b value for ammonia = 1. 8 × 10 −5).
Answers
Answer: lol
Explanation: ok 11 plus 1 is 12
a hydrogen tank has a pressure of 101,325 Pa at 30 degrees celcius.At what temperature would its pressure be equal to 1.75 atm?
Answers
The temperature at which the pressure will be equal to 1.75 atm, given that the tank has an initial pressure of 101325 Pa is 257.25 degrees celsius
How do i determine the temperature?First, we shall list out the given parameters from the question. This is shown below:
Initial pressure (P₁) = 101325 Pa = 101325 / 101325 = 1 atm Initial temperature (T₁) = 30 degrees Celsius = 30 + 273 = 303 KFinal pressure (P₂) = 1.75 atmFinal temperature (T₂) =?The final temperature can be obtain as follow:
P₁ / T₁ = P₂ / T₂
1 / 303 = 1.75 / T₂
Cross multiply
1 × T₂ = 303 × 1.75
T₂ = 530.25 K
Subtract 273 to obtain answer in degree celsius
T₂ = 530.25 – 273 K
T₂ = 257.25 degrees celsius
Thus, the temperature required is 257.25 degrees celsius
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A formula for the relationship between weight and blood pressure in children is given by the formula below where P(x) is measured in millimeters of mercury and x is measured in pounds. Use the formula to answer the questions. P(x)=17.9(9+lnx)10≤x≤100 What is the rate of change of blood pressure with respect to weight at the 60-pound weight level? The rate of change at the 60-pound weight level is approximately mm/ pound. (Do not round until the final answer. Then round to the nearest hundredth as needed.) What is the rate of change of blood pressure with respect to weight at the 70-pound weight level? The rate of change at the 70-pound weight level is approximately mm/ pound. (Do not round until the final answer. Then round to the nearest hundredth as needed.)
Answers
The formula for the relationship between weight and blood pressure in children is:
P(x) = 17.9(9 + ln x) 10 ≤ x ≤ 100To find the rate of change of blood pressure with respect to weight at the 60-pound weight level.We differentiate the above function with respect to x Therefore:
dP/dx = 17.9(1/x)Now substituting x = 60 in the above equation, we get: dP/dx = 17.9(1/60) dP/dx = 0.298The rate of change at the 60-pound weight level is approximately 0.30mm/ pound.Rate of change at the 70-pound weight level:
Similarly, we can find the rate of change at 70-pound weight level, by differentiating the function P(x) with respect to x. Therefore, dP/dx = 17.9(1/x)Now substituting x = 70 in the above equation, we get:dP/dx = 17.9(1/70) dP/dx = 0.2557The rate of change at the 70-pound weight level is approximately 0.26mm/ pound.About BloodBlood is a fluid found in all living things that functions to deliver substances and oxygen needed by body tissues, transports chemical products of metabolism, and also acts as the body's defense against viruses or bacteria. Blood has the function of regulating acid and base balance. ,transports O2, carbohydrates, and metabolites, regulates body temperature by conduction or conduction, carries body heat from heat production centers (liver and muscles).
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what is so unique about the ph scale 7?
Answers
Answer:
The pH scale 7 indicates neutral.
Explanation:
set up a cell that has a zn electrode in a 1.0 m aqueous zn2 solution on the left side and a ag electrode in a 1.0 m aqueous ag solution on the right side. add the salt bridge. what is the balanced net ionic equation for this reaction? include physical states.
Answers
The balanced net ionic equation for the setup with a Zn electrode in a 1.0 M aqueous Zn²⁺ solution on the left side and an Ag electrode in a 1.0 M aqueous Ag⁺ solution on the right side with a salt bridge added can be represented as follows: Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s)
In this setup, zinc metal (Zn) is oxidized and loses electrons at the anode to form zinc ions (Zn²⁺), while silver ions (Ag⁺) from the silver salt solution (AgNO₃) gain electrons at the cathode to form silver metal (Ag). The salt bridge is necessary to maintain electrical neutrality in both half-cells by allowing the transfer of anions and cations between them.
The balanced net ionic equation above represents only the species involved in the redox reaction, with the spectator ions (NO₃⁻ and Cl⁻) omitted. It also indicates the physical states of the reactants and products, with (s) representing solid, (aq) representing aqueous, and (l) representing liquid.
In summary, the balanced net ionic equation for the setup described is Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s), where zinc metal is oxidized at the anode and silver ions are reduced at the cathode, with a salt bridge facilitating the transfer of ions between the two half-cells.
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Which is poisonous tin or lead?
Answers
Answer:
lead
Explanation:
Answer:
Lead is poisonous.
Explanation:
Given an initial mass of 10.26 g n2, an excess of o2, and assuming that all of the reactant is converted to product(s), and none is lost, calculate the mass (g) of no produced by the reaction.
Answers
We assumed that all of the reactant is converted to product, so the calculated mass of NO is an overestimate. The mass of NO produced by the reaction is 15.18 g.
To calculate the mass of NO produced, we need to determine the limiting reactant and then use the balanced chemical equation to find the molar ratio between the limiting reactant and the product.
First, we need to find the moles of N2. The molar mass of N2 is 28 g/mol, so we divide the initial mass of N2 (10.26 g) by the molar mass to get the moles of N2: 10.26 g / 28 g/mol = 0.366 mol.
Next, we need to find the moles of O2. Since it is in excess, we don't need to consider the initial mass.
Using the balanced chemical equation, we see that the molar ratio between N2 and NO is 1:2. Therefore, the moles of NO produced will be twice the moles of N2: 0.366 mol * 2 = 0.732 mol.
Finally, we can convert the moles of NO to grams using the molar mass of NO, which is 30 g/mol: 0.732 mol * 30 g/mol = 21.96 g.
However, we assumed that all of the reactant is converted to product, so the calculated mass of NO is an overestimate. Therefore, the actual mass of NO produced will be less than 21.96 g.
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i need help with scientific notation. this is the decimal notation form help.
Answers
Answer:
1.23345*10^11
5.768*10^(-5)
3.456*10^(-2)
2.28*10^9
8.0970*10^4
Explanation:
You just need to count the number of zeros and move the values backward and forward to get the scientific notation.
I NEED HELP QUICK Activity:
Part 1: Write all bold vocabulary and define the words (See attached PDF File below). Make sure to number each.
Part 2: Look at the "Second Read of Investigating Landforms On Venus" worksheet (Slide 14) and highlight text to the questions on the worksheet.
Part 3: Answer the questions on the "Second Read of Investigating Landforms On Venus" worksheet: 1) How were the novae on Venus similar to the landforms in Geyra's computer model? AND 2) How did the results of Gerya's model provide evidence for what formed the novae on Venus? (Slide 16)
Part 4: Write the notes: (Slide 19)
3) Scientists can use models to test their ideas and get evidence about processes in the natural world that are difficult to observe.
Exit Slip: How do models help scientists answer questions?
Answers
Which of the following statements is true about the current in a wire?
A. Depends only on the resistance of the wire
B. Depends only on the potential difference applied
C. Depends on both resistance and potential difference
D. Does not depend on resistance and potential difference
Answers
Answer:
the answer is a
Explanation:
Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.
Is this a chemical reaction? Explain your reasoning. (Will give brainliest)
Answers
yes , this is a reaction.
in this sodium hydroxide reacts with copper sulfate
draw the molecule by placing atoms on the grid and connecting them with bonds. use square brackets to denote the overall charge. include all lone pairs of electrons. clo3- clo4- no3- so3
Answers
ClO3-: The chlorine atom carries a single negative charge.
ClO4-: The chlorine atom carries a single negative charge.
NO3-:The nitrogen atom does not carry any charge, and the molecule as a whole carries a single negative charge.
Certainly! Here are the drawings of the molecules you requested:
1. ClO3-
O
|
Cl - O
|
O [-
2. ClO4-
O
|
Cl - O
|
O
|
O [-
3. NO3-
O
||
N - O
|
O [-
4. SO3
O
||
S - O
||
O
Please note that for SO3, it does not carry any charge (neutral molecule), as requested.
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IM IN A TEST PLS HELP
A solution of the acid contains hydrogen ions. Write an ionic equation for the reaction of sodium with the hydrogen ions in the acid. Include state symbols in your answer.
Answers
Answer:
The thing to recognize here is the fact that you're dealing with a neutralization reaction that features sodium hydroxide,
NaOH
, a strong base, and hydrochloric acid,
HCl
, a strong acid.
This tells you that the two reactants will dissociate completely in aqueous solution to produce cations and anions. More specifically, you will have
NaOH
(
a
q
)
→
Na
+
(
a
q
)
+
OH
−
(
a
q
)
HCl
(
a
q
)
→
H
+
(
a
q
)
+
Cl
−
(
a
q
)
Now, when these two solutions are mixed, the hydroxide anions produced by the strong base and the hydrogen ions produced by the strong acid will neutralize each other to produce water.
The sodium cations and the chloride anions act as spectator ions because they are present on both sides of the chemical equation as ions.
You can tell that this is the case because sodium chloride,
NaCl
, one of the two products of the reaction, is soluble in aqueous solution.
So, the complete ionic equation will be
H
+
(
a
q
)
+
Cl
−
(
a
q
)
+
Na
+
(
a
q
)
+
OH
−
(
a
q
)
→
Na
+
(
a
q
)
+
Cl
−
(
a
q
)
+
H
2
O
(
l
)
To get the net ionic equation, simply remove the spectator ions
H
+
(
a
q
)
+
Cl
−
(
a
q
)
+
Na
+
(
a
q
)
+
OH
−
(
a
q
)
→
Na
+
(
a
q
)
+
Cl
−
(
a
q
)
+
H
2
O
(
l
)
You will end up with
H
+
(
a
q
)
+
OH
−
(
a
q
)
→
H
2
O
(
l
)
SIDE NOTE You will sometimes see the hydrogen ion being replaced by the hydronium ion,
H
3
O
+
.
In this case, the dissociation of hydrochloric acid is represented by the chemical equation
HCl
(
a
q
)
+
H
2
O
(
l
)
→
H
3
O
+
(
a
q
)
+
Cl
−
(
a
q
)
The net ionic equation will now take the form
H
3
O
+
(
a
q
)
+
OH
−
(
a
q
)
→
2
H
2
O
(
l
)
if co and nh3 are allowed to effuse through a porous membrane under identical conditions, the rate of effusion for nh3 will be ________ times that of co .
Answers
If CO and NH₃ are allowed to effuse through a porous membrane under identical conditions, the rate of effusion for nh3 will be 1.28 times that of CO.
The rate of effusion for a gas is inversely proportional to the square root of its molar mass. The effusion rate can be represented by the equation:
Rate of Effusion ∝ 1/√(Molar Mass)
In this case, we are comparing the rates of effusion for NH₃ (ammonia) and CO (carbon monoxide). To determine the ratio of their effusion rates, we can calculate the ratio of their square roots of molar masses.
The molar mass of NH₃ is approximately 17.03 g/mol, while the molar mass of CO is approximately 28.01 g/mol. Taking the square roots of these molar masses, we get:
√(Molar Mass of NH₃) ≈ √17.03 ≈ 4.12
√(Molar Mass of CO) ≈ √28.01 ≈ 5.29
Now, we can calculate the ratio of the effusion rates:
Rate of Effusion(NH₃) / Rate of Effusion(CO) ≈ √(Molar Mass of CO) / √(Molar Mass of NH₃)
≈ 5.29 / 4.12 ≈ 1.28
Therefore, the rate of effusion for NH₃ will be approximately 1.28 times that of CO under identical conditions.
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Nitrogen is collected over water at 21.5°C. What is the partial pressure of nitrogen if the atmospheric pressure is 99.4 kPa?
Answers
The partial pressure of the nitrogen gas is observed as 80.7 kPa.
What is the partial pressure?The term partial pressure has to do with the pressure of a particular gas that is a component of a mixture of gases. Now we have from the question that the pressure of the gas has been observed as 99.4 kPa
The next thing that we must do is to find the vapor pressure of water at that temperature as this could help us to be able to get the partial pressure of the nitrogen at that temperature.
We can now see that the partial pressure of the nitrogen gas is; 99.4 kPa -18.7 kPa = 80.7 kPa
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If a sound wave refracts, what happens to it? Select all that apply.
It changes its speed and wavelength when it bounces off of a solid surface.
B
It changes direction when it passes through an opening
С
It changes its speed and wavelength when it passes through an opening
D
It changes direction when it passes from one medium to another
E
It changes its speed and wavelength from one medium to another.
F
It changes direction when it bounces off of a solid surface.
Answers
If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.
What is refraction of sound wave ?An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.
Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.
If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Sound propagates in all directions from a point source.
Thus, option A, C and D are correct.
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2H2O(g) -- 2H2(g) + O2(g)
What total volume of gas (at STP) is produced by the electrolysis of 4 moles of H2O?
Answers
Explanation:
\(v = vdm \times n\)
Vdm=22.4dm.
mole(n)=4 mol
therefore the total volume
\(v = 22.4 \times 4 \\ v = 89.6dm\)
what is neutralisation reaction? why is it named so? give one example.
Answers
Answer:
In chemistry, neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.Neutralization reactions are the reaction between acid and base. The products formed are water and salt. It is called so because the acid and base neutralize each other to form water and salt.Hint: The neutralization reaction is the one in which an acid reacts with an equimolar amount of base to give salt and water. The example could be a reaction between any strong acid and a base. The sodium chloride formed is a result of neutralization reaction.
Trust me mark me as brainliest trust me
What happens when balanced forces act on an object at rest?
Answers
Answer:
Balanced forces do not cause a change in motion.
The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.
Explanation:
Answer:
The result is no motion. Balanced forces can cancel each other out. Any time there is a balanced force, the object does not move.
Explanation: MARK MOST BRAINLIEST PLEASE
When one substance attracts and combines with another substance to form a uniform solution, the process is called ___
a. Absorption b. Adsorption
c. Subcooling d. Subheating
Answers
When one substance attracts and combines with another substance to form a uniform solution, the process is called Adsorption. The correct answer is b.
Adsorption refers to the process in which one substance is attracted to and combines with another substance to form a uniform solution. In adsorption, the molecules of the adsorbate (the substance being attracted) adhere to the surface of the adsorbent (the substance attracting). This process occurs through weak intermolecular forces such as van der Waals forces or hydrogen bonding. Adsorption is commonly observed in various fields, such as chemistry, biology, and environmental science, and plays a significant role in processes like chromatography, catalysis, and water treatment. Hence the correct answer is b.
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Use the graph to complete the statement below. Assume that pressure and number of moles of gas are constant in this problem.
This graph shows that temperature and volume have
Answers
The graph would indicate an inverse linear relationship between pressure and volume. Option B
What does the graph show?
The graph would indicate a direct inverse relationship between pressure and volume. In other words, as the volume decreases, the pressure increases, and as the volume increases, the pressure decreases.
This relationship is known as Boyle's Law, which states that for a fixed amount of gas at a constant temperature, the product of pressure and volume is constant.
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Missing parts:
Assume that temperature and number of moles of
gas are constant in this problem.
Use the graph to complete the statement below.
This graph shows that pressure and volume have
✓
a direct linear relationship
an inverse linear relationship
a direct nonlinear relationship
an inverse nonlinear relationship
Answer: a direct linear relationship
Explanation:
On what is the geological time scale based?
A: changes in climate and historical records
B: geological and biological events
C: geological events
D: evolutionary events
Answers
Answer: The answer is b for sure
Explanation: Because, I took the test
If 12.52mol of aluminum metal is reacted with2.38mol of iron (III) oxide, how many particles, inmoles of iron metal are likely to form?Reaction: 2Al(s) + Fe₂O3(aq)--> Al2O3(aq) + 2Fe(s)
Answers
Answer
4.76 mol Fe
Procedure
Consider the following balanced equation and determine the limiting reagent using the coefficients method
2Al(s) + Fe₂O3(aq)--> Al2O3(aq) + 2Fe(s)
\(12.52\text{ mol Al}\frac{2\text{ mol Fe}}{2\text{ mol Al}}=12.52\text{ mol Fe}\)\(2.38\text{ mol Fe}_2\text{O}_3\frac{2\text{ mol Fe}}{1\text{ mol Fe}_2\text{O}_3}=4.76\text{ mol Fe}\)The lowest amount is the one produced by the iron (III) oxide therefore that is the limiting reagent and 4.76 mol of Fe is the max amount that can be produced of Iron.
The south end of Earth's axis is tilted toward the Sun in?
Group of answer choices
December
September
March
July
PLEASE THIS IS VERY IMPORTANT! ANSWER PLEASE
Answers
Answer:
December
Explanation:
Southern Hemisphere experiences winter in July, therefore it experiences Summer in December.
two atoms With diferent mass number but the same atomic number are called
Answers
Answer:
they are called isotopes
Draw the structure(s) of the major organic product(s) of the following reaction. 1. LiAlH4 / dry Et O -H 2. aqueous HCI • You do not have to consider stereochemistry. • If no reaction occurs, draw the organic starting material. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu
Answers
Structure and the reaction is in the attached photo.
Amides, RCONR'2, can be reduced to the amine, RCH2NR'2 by conversion of the C=O to -CH2-. Amides can be reduced by LiAlH4 but not the with the less reactive NaBH4. Some of the reagents are LiAlH4 / ether solvent, followed by water.
This reduction reaction is different from the different to that of other C=O compounds which reduce to alcohols like in esters.
Lithium aluminium hydride (LiAlH4) and sodium borohydride are the two most frequent sources of the hydride nucleophile (NaBH4).
The presence of a polar metal-hydrogen bond in these reagents acts as a source of hydride rather than the hydride anion, which is absent during this reaction. Since the Al-H bond in LiAlH4 is more polar and aluminium is less electronegative than boron, LiAlH4 is a more potent reducer.
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Why is elemental zinc considered a pure substance?
Select one:
It is a metal.
It is a mixture of different atoms.
All elements are considered pure substances.
It must be created in a lab.
Answers
Answer: C... Because Zinc is made of only one type of atoms.
Explanation: All elements are made of one type of atom. Pure gold is made out of only gold atoms, silver out of only silver atoms, etc.
How do I do nunber 8?
Answers
Answer:
DONT CLICK THAT LINK THAT IS HACK AND VIRUS
Explanation:
Use the reaction given below to solve the problem that follows: Calculate the mass in grams of aluminum oxide produced by the reaction of 15.0 g of aluminum metal.
[ ]grams Al2O3
4 Al + 3 O2 --> 2 Al2O3
**Your answer should be written as XX.X
Answers
Answer: 28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal
Explanation:
To calculate the moles :
\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)
\(\text{Moles of} Al=\frac{15.0g}{27g/mol}=0.556moles\)
The balanced chemical equuation is:
\(4Al+3O_2\rightarrow 2Al_2O_3\)
According to stoichiometry :
4 moles of \(Al\) produce == 2 moles of \(Al_2O_3\)
Thus 0.556 moles of \(Al\) will produce=\(\frac{2}{4}\times 0.556=0.278moles\) of \(Al_2O_3\)
Mass of \(Al_2O_3=moles\times {\text {Molar mass}}=0.278moles\times 102g/mol=28.4g\)
Thus 28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal.