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azamat
3 years ago
13

Which describes the current model of the atom ?

Physics
1 answer:
Aleksandr [31]3 years ago
4 0

Answer:

it would be A

Explanation:

just did this lesson

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Who pays the income tax, the payroll tax, the estate and gift taxes? Who bears the burden of the gasoline and tobacco taxes? If Congress were to raise this tax rate, or lower that tax deduction, who would gain and who would lose? The outcomes of the political battles over changes in the tax system often hinge on the answers to such questions. This paper will discuss the economic consequences of taxation and the factors that influence where the burden of various taxes really falls. It will review some of the discussions in the economic literature. Finally, it will suggest that a shift to a markedly different type of tax system would benefit all players in the economy.
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2 years ago
A horse performs 2600 joules of work pulling a wagon for 13 seconds. What is the horse's power? 33800 W 200 W 0.005 W 2600 WA ho
tensa zangetsu [6.8K]

Answer:

200 W

Explanation:

The power is given by the ratio between the amount of work done and the time taken to perform the work:

P=\frac{W}{t}

where in this problem we have

W = 2600 J is the work done

t = 13 s is the time taken to do the work

Substituting the numbers into the equation, we find

P=\frac{2600 J}{13 s}=200 W

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The answer is gn Fertilization
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2 years ago
A source emits sound of wavelengths 2. 64 m and 2. 72 m in air.
andreyandreev [35.5K]

(a) If a source emits sound of wavelengths 2. 64 m and 2. 72 m in air, 4 beats per second will be heard.

(b)The maximum intensity regions are apart by 90 m (approx).

Given,

Wavelengths of sound waves emitted by the source are respectively  = 2.64 m and λ2 = 2.72 m

(a) As the measurement of the beats per second is equal to the frequency difference of the overlapping two sound waves,

Therefore, the frequency difference of the two waves is,

Δf =(f_{1} -f_{2})

where f_{1} and f_{2 } are the frequencies of waves of wavelength λ1 and λ2

Now, speed of sound in air at temperature t = 20° C, is v = 343 m/s

∴ Δf = (f_{1} -f_{2})

⇒Δf = \frac{v}{\lambda1}-\frac{v}{\lambda2}  \\

⇒Δf =\frac{343}{2.64} -\frac{343}{2.72\\}=3.82

⇒Δf ≅ 4

Hence 4 beats per second will be heard.

(b)  When two waves overlap in the same phase in a region the intensity of that region becomes maximum due to constructive interference.

For constructive interference, the path difference is = nλ

Therefore the difference between the maximum intensity regions is given by,

d = \frac{v}{\Delta f} = \frac{343}{3.82\\}= 89.79

⇒d≅90 m

Hence the maximum intensity regions are apart by 90 m (approx).

Learn more about constructive interference on

brainly.com/question/22882887

#SPJ4

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1 year ago
Someone please help me on these two
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i think its D 12345678901234567890

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