Sound is created through vibrations in the air which causes the auditory sensation in your ear – making you able to hear the noises that we do. Sound produced by different sources have different characteristics like amplitude , wavelength and frequency. Analyze the diagrams to answer the following questions with suitable reasons. (A)Which represents the highest pitched sound?. Give reason.

Answer:

2-Methylhexane

Because Ethylexane does not have hydrogen molecules neither,also it only has 2 options but they're just repeated

Answer: it’s C hope that helps

Answer:

hmm I don't think its D because that doesn't have anything to do with your heath I don't think it's C either, probably not global warming so I think its A

Explanation:

I hope that helped :)

sorry if I'm wrong

Answer:

The second one would be one of the application of an endothermic reaction as because endothermic reaction always have the heat in the process to mix the reactants and form the products as here in a burning wood when the wood is supplied with heat then it change into products as ashes and smoke fumes So here due to the heat is involved to form the products thats the reaction is endothermic reaction.

Hope it helps

Answer:

The composition of a pure substance is always the same, regardless of the source, but the composition of a mixture can vary.

Mixtures can be separated into their components by physical changes; some pure substances can be separated into components by chemical change.

Explanation:

A chemically pure substance has a well defined and constant composition. The composition of a chemically pure substance remains the same irrespective of its source. Also, the components of a chemically pure substance may be separated by chemical changes.

Mixtures have a variable composition depending on their  respective sources. The composition of a mixture varies with the source of the mixture and mixtures are separated by physical processes.

Answer:

A film badge

Explanation:

The film badge dosimeter or film badge is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation. It of a photographic film and a holder. This film badge is used to determine or measure and record the radiation exposure as a result of radiations, x-rays, gamma rays and also beta particles.

All users of medical x-ray equipment (C-arms, fluoro units, therapy units) must wear badges. Those using larger quantities of radioactive materials will also be provided badges. The correct option is A.

Ionising radiation exposure is measured using photographic film for personnel monitoring purposes. A filter that protects part of the film from particular types of radiation may also be present in the film badge, which may contain two or three films with varying sensitivity levels.

A particular kind of passive dosimeter is the film badge. It comprises of a photographic emulsion film in a light-tight wrapping (kept in a holder) that changes optical density in response to ionising radiation. The holder, which also includes several filters (for calculating tissue equivalent amounts), is typically worn on the body's trunk.

So film badge is the device used most commonly today for monitoring the radiation exposure of personnel.

Thus the correct option is A.

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Answer:

Explanation:

Heterozygous cross with a hom.ozygous recessive yields the following results

50% rr (hom.ogyzous recessive)

50% Rr (heterozygous dominant)

A heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).

Crossing over is a type of cellular process which occurs during the process of meiosis when chromosomes of the same type line up. When these two chromosomes – one from the mother and one from the father – line up, parts of the chromosome can be switched. Two chromosomes contain the same genes, but the genes may have different forms.

The organisms in this initial hybridization are called the parental or P generation. The progeny of the Rr x rr cross are called F1 generation which will have a heterozygous cross with the homozygous recessive giving the following results: 50% Rr (homozygous recessive) and 50% rr (heterozygous dominant)

A cross between two of the offspring in F1 generation would produce a new set of progeny called second filial generation (or F2 generation).

Thus, a heterozygous cross with a homozygous recessive gives the following results: 50% rr (homozygous recessive) and 50% Rr (heterozygous dominant).

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Answer:

false

Explanation:

Answer:

false

Explanation:

lava is on the earth

Answer:

Al is oxidized

Cu is reduced

Answer:

here

Cu is reduced

and

Al is oxidised

hope this will help you

have a nice day

Answer:

16.8dm3

Explanation:

2 moles of CO gives 1 mole of N2

2 moles of CO= 2* 28= 56g

1 mole of N2 = 1* 22.4dm

56g of CO gives 22.4dm3 of N2

42.7 of CO will give> (42.7*22.4)/56

=16.8dm3

The volume of [tex]N_{2}[/tex] gas will be produced 16.8 [tex]dm^{3}[/tex].

Volume is sometimes referred to as capacity. The volume of a cylindrical jar, for example, is used to determine how much water it can hold.

Calculation of volume is shown below:

The given reaction is: 2CO(g) + 2NO) → N2(g) + 2CO2(g)

It can be seen that 2 moles of CO give 1 mole of [tex]N_{2}[/tex].

So, 2 moles of CO = 2×28 = 56 g.

Hence, 1 mole of [tex]N_{2}[/tex] = 1×22.4 = 22.4 [tex]dm^{3}[/tex].

56 g of CO will give 22.4 [tex]dm^{3}[/tex] of nitrogen atom.

42.7 of CO will give = (42.7×22.4) / 56

= 16.8 [tex]dm^{3}[/tex].

Therefore, the volume of nitrogen will be 16.8 [tex]dm^{3}[/tex].

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Answer:

NaOH+ N2O3---> NaNO2 + H2O

Answer:

.5 M

Explanation:

molarity = moles / liters

2.5/5 = .5 M

Answer:

Hello There!!

Explanation:

I believe the answer is nuclear.

hope this helps,have a great day!!

~Pinky~

Answer:

C) Nuclear

Explanation:

Trust the process

Edge 2021

Answer:

x is HCl because pH = 2 (acid and it reacted with Mg plus it turned litmus paper to red)

y is NaOH because pH = 10 (base and turned litmus paper to blue)

z is NaCl because pH = 7 (neutral and no reaction to litmus paper and Mg)

Answer:

Periodic Table

hope this helps

have a good day :)

Explanation:

The periodic table allows you to compare the elements and understand their properties​.

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.

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an element is a substance that cannot be split into simpler substances by a chemical means . for example - hydrogen, oxygen, nitrogen, carbon, iron, aluminium, copper, silver and gold some example of elements.

Explanation:

The mass of one mole of a substance, expressed in gms, is equal to the mean molecular mass of the substance. The molecular mass of CO2= 12+2x16= 44 so the mass if a mole of CO2 is approximately 44 grams.

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Answer:

A group is a column of elements in the periodic table of the chemical elements.

So, the columns on the periodic table are called groups.

Answer:

V2~0.4839M

Explanation:

We're going to use Boyles law to answer the question.

Boyle's law:

P1V1=P2V2

P1=151mmHg

P2=166mmHg

V1=0.532L

V2=?

V2=(P1 x V1)/P2

V2=(151 x 0.532)/166

V2~0.4839M

Hope it helps:)

Answer: C. unknown

Explanation: got it right on acellus

Answer:

HCl, H2O, and NH3 are the most polar of these, so they won't behave ideally because the particles have greater attractive forces between them. How does the kinetic-molecular theory explain the pressure exerted by gases? ... Particles are always in motion and when they are contained, they are elastic collisions.

The particles have high intermolecular forces, reducing the elasticity of their collisions.

Polar molecules are formed when a high electronegative atom combined with a less electronegative atom.

Ammonia, sulfur dioxide, hydrogen sulfide, are polar gases.

The non-polar gases are inert gas or noble gas.

The polar compounds are asymmetrically array.

Thus, the correct option is 4, The particles have high intermolecular forces, reducing the elasticity of their collisions.

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Answer:

Trabalho realizado por máquina térmica  = 250 J

Explanation:

Dado

Eficiência da máquina térmica = 5% = 0,05

A eficiência é igual à proporção do trabalho realizado pela máquina térmica para o calor fornecido a ela

Por isso,

0,05 = Trabalho realizado por máquina térmica / 5000 J

Trabalho realizado por máquina térmica = 5000 J * 0,05 = 250 J

Answer:

1..... nucleus

2......electron cloud

3.......protons

4........Neutrons

5..........electron

6............electrons

7...............Isotopes

8.....,...........ions

9....................charge

Answer:

The answer is "[tex]K_1 < K_2[/tex]"

Explanation:

In the given question, the value of the [tex]K=Ae^{-\frac{Ea}{RT}}[/tex] and the [tex]T_1 <T_2[/tex]is the rate value which is the constant that is  [tex]K_2>K_1[/tex]. As per the temperature value when its increase rate is constantly increasing. [tex]E_a[/tex] is activation energy it is not dependent on the temperature that why the answer is [tex]K_1 < K_2[/tex].

Answer:

There are 3 significant figures on this one.