A bolt of lightning strikes the ground 3.5 km (2.2 mi) away and is followed by a crack of thunder. Thunder has a frequency of around 100 Hz and a wavelength of approximately 3.5 m. Use this information to answer the following questions.
i. How long does it take for the light to reach your eye? (2 points)









ii. What will the delay be between lightning flash and thunder boom? (2 points)









iii. Would low-frequency sound waves such as thunder most likely be studied using quantum mechanics or classical mechanics? What would be used to study lightning? (1 point)

Answer:

waxing crescent

and 4 nbr ans is C

Answer:

5.9375 L

Explanation:

To solve this question you use the proportionality of dilutions

C1 × V1 = C2 × V2

4.75 M × 1.50 L = 1.20 L × V2

⇒ V2 = (4.75 M × 1.50 L) / (1.20 L) = 5.9375 L

Answer:

32

Explanation:

Because if the atomic number is 32 that is how many electrons are found in the element. There are 42 neutrons and 32 protons

Answer:

There are three primary technologies by which solar energy is harnessed: photovoltaics (PV), which directly convert light to electricity; concentrating solar power (CSP), which uses heat from the sun (thermal energy) to drive utility-scale, electric turbines; and solar heating and cooling (SHC) systems, which collect ...

Hydropower is the most important and widely-used renewable source of energy. Hydropower represents about 17% (International Energy Agency) of total electricity production. China is the largest producer of hydroelectricity, followed by Canada, Brazil, and the United States (Source: Energy Information Administration).

There are four ways to release the energy stored in biomass: burning, bacterial decay, fermentation, and conversion to gas/liquid fuel.

Geothermal energy can heat, cool, and generate electricity: Geothermal energy can be used in different ways depending on the resource and technology chosen—heating and cooling buildings through geothermal heat pumps, generating electricity through geothermal power plants, and heating structures through direct-use ...

Answer:

2Fe + 3H2SO4 + Fe2(SO4)3+ 3H2

Explanation:

1. Fe (SO4) 3 is an incorrectly written formula because iron is trivalent as we can see by this three ahead of SO4. SO4 is divalent always.

2. since (SO4) is 3, this three shows us that there must be 3 in the reactants as well.

so now there is 3H2SO4

3. Since we have added 3 to one hydrogen we must add another. So now it's 3H2

4. and finally iron. In Fe2 (SO4) 3 we see this 2 in front of Fe which means it goes 2Fe.

The molecule has a Linear shape with a bond angle of 180  degrees.

Bond angle refers to the dihedral angle between two atoms that are connected to the same central atom. The central atom in this case is Xe.

We are told that there are three lone pairs of electrons that surround Xe. It then follows that the molecule has a Linear shape with a bond angle of 180  degrees.

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Answer:

Water plays many important roles in the body including,flushing waste from the body,regulating body temperature,transportation of nutrients and is necessary for digestion.No wonder it is considered "essential"!.Plain water is the best choice for hydrating the body.

Explanation:

hope it helps you><

Answer:Papillae contain taste buds that help animals determine whether food is safe to eat.

Explanation:

Answer:

Candela

Explanation:

Note

If it's only intensity of radiant energy then the unit is W/m^2

Answer:

laurasia and gondwana is the correct answer

Answer:

I believe D

Explanation:

I am dearly sorry If I am wrong,

Answer:

I believe the answer is B

Explanation:

Answer:

glaciers

Explanation:

The water from inside the test tube most likely came from the blue copper sulfate crystal which is a hydrated salt.

Hydrated salts contain water of hydration.

A blue copper sulfate crystal contains water of hydration.

When heated, the water evaporates off to give an anhydrous salt which appears colorless.

The equation of the reaction is as follows:

CuSO4•5H2O -----> CuSO4 + 5H2O(g)

More on water of hydration can be found here: https://brainly.com/question/919417

Answer: Advantages and Challenges of Nuclear Energy Nuclear energy protects air quality by producing massive amounts of carbon-free electricity. It powers communities in 28 U.S. states and contributes to many non-electric applications, ranging from the medical field to space exploration.

Explanation:

Food flavorings as use of pomace has become more available through new technologies

This simply refers to a dry residue of a particular material from which a liquid is extracted. However, it is highly rich in nutrients such as:

So therefore, food flavorings as use of pomace has become more available through new technologies

Learn more about pomace:

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The acid - base equation between H2PO3^- and HS^- is H2PO3^- +  HS^- ⇄S^- + H3PO3.

An acid is a substance that can donate hydrogen ions while a base is a substance that can accept hydrogen ion. This is the acid base definition according to Brownstead - Lowry.

To show the acid - base relationship between H2PO3^- and HS^-, we have the equation;

H2PO3^- +  HS^- ⇄S^- + H3PO3

Learn more about acids and bases: https://brainly.com/question/10282816

1) According to the law of conservation of mass, which statement about chemical reactions is always true?

Answer: The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products.

2) When 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2), how many moles of ammonia (NH3) are produced?

Answer:

2 moles

3) Sulfur trioxide gas combines with water to form a single product.

SO3 + H2O → ?

Based on the law of conservation of mass, which option is the product of the reaction?

Answer:

H2SO4

4) Lead (II) nitrate as Pb(NO3)2 and potassium iodide as KI combine to form the products shown.

2 KNO3 + PbI2

How many moles of each reactant are involved in the reaction?

Answer:

1 mole of lead (II) nitrate and 2 moles of potassium iodide

5) In a reaction, 1 mole of silver nitrate combines with 1 mole of sodium chloride.

AgNO3 + NaCl

Which statement about the product is justified by the law of conservation of mass?

Answer:

There will be 1 mole of silver (Ag) in the product.

According to the law of conservation of mass, the statement that is always true about chemical reactions is "The total mass of the reactants is equal to the total mass of the products."

The law of conservation of mass states that in a closed system, the total mass of substances before a chemical reaction is equal to the total mass of substances after the reaction.

The matter is neither created nor destroyed during a chemical reaction; it is simply rearranged to form new substances.

This principle holds true for all chemical reactions, regardless of the types of substances involved or the complexity of the reaction.

It also helps to establish the stoichiometry of reactions, which involves determining the relative quantities of substances involved in a reaction based on their balanced chemical equation.

To learn more about the law of conservation of mass, follow the link:

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#SPJ6

Answer:

Yes

Explanation:

Beacuse it shows the tempature of the day

Answer: (2)react completely in the reaction

limiting reactant determines the number of moles in a chemical reaction

excess reactant is the reactant with an excess number of moles

Answer:

D.) An acid and a base

Explanation:

One part of an acid is H+ and the other part is a negatively charged ion. One part of a base is -OH and the other part is a positively charged ion. When an acid and base react, the H+ and -OH combine to form water and the ions combine to form a salt.

The others are incorrect because they do not guarantee that water (H2O) and a salt are products.

Answer:

239

Explanation:

i think this is the answer

The mole ratio of lead (II) nitrate to aluminum chloride would be 3:2 while that of lead (II) chloride to aluminum nitrate would also be 3:2

Chemical equations

The balanced chemical equation of the reaction between lead(II) nitrate and aluminum chloride is as follows:

3Pb(NO3)2 + 2AlCl3 → 3PbCl2 + 2Al(NO3)3

Thus, the mole ratio of lead (II) nitrate to aluminum chloride is 3:2 while the mole ratio of lead (II) chloride to aluminum nitrate is also 3:2

More on chemical equations can be found here: https://brainly.com/question/20492533

Answer:3:2 and 3:2

Explanation: got it right on CK12

Answer:

Biological stains are used for the medical and biological industries to aid in detection of structures within tissues. This can include the detection of abnormalities, but is not limited to that. The stains are used to define and examine cell populations within the tissues, to mark cells, or to flag proteins.

Answer:

All of the carbon-carbon bonds have exactly the same lengths - somewhere between single and double bonds. There are delocalized electrons above and below the plane of the ring. The presence of the delocalized electrons

Explanation:

hope it helps

Answer:

Number of Significant Figures: 3

The Significant Figures are 4 8 0

Answer:

m = 0.122 m

Explanation:

Molality(m): A measure of the number of moles of solute in a solution corresponding to 1 kg or 1000 g of solvent.

[tex]\mathrm{Molality\:Formula}:\quad \mathrm m = \dfrac{ mole\:of\:solute }{ mass\:of\:solvent\:in\:kg }[/tex]

[tex]\mathrm m = \dfrac{ mole}{ kg }[/tex]

[tex]\mathrm{Substitute\:the\:numbers\:into\:the\:"Molality\:Formula"}[/tex]

[tex]\mathrm m = \dfrac{ 0.250 }{ 2.05 }[/tex]

[tex]\mathrm{Divide\:0.250\:by\:2.05\:and\:get\:0.12195122}[/tex]

[tex]\mathrm m = {0.12195122}[/tex]

[tex]\mathrm{Round\:to\:the\:nearest\:thousandths\:place}[/tex]

[tex]\mathrm m = 0.122[/tex]

Answer:

To calculate the molality of the resulting solution, we need to use the formula:

Molality (m) = moles of solute / mass of solvent (in kg)

Given:

Number of moles of NaCl (solute) = 0.250 mol

Mass of H2O (solvent) = 2.05 kg

Step 1: Convert the mass of the solvent from grams to kilograms:

Mass of H2O = 2.05 kg

Step 2: Calculate the molality using the formula:

Molality (m) = moles of solute / mass of solvent (in kg)

Molality = 0.250 mol / 2.05 kg

Molality = 0.122 mol/kg

Therefore, the molality of the resulting solution is 0.122 mol/kg.

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