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disa [49]
3 years ago
11

A transverse wave is observed to be moving along a lengthy rope. Adjacent crests are positioned 2.4 m apart. Exactly six crests

are observed to move past a given point along the medium in 9.1 seconds. Determine the frequency of these waves
Chemistry
1 answer:
tia_tia [17]3 years ago
7 0

Answer:

f = 0.65 hz

Explanation:

Given that,

The distance between adjacent crests, wavelength = 2.4 m

6 crests are observed to move past a given point along the medium in 9.1 seconds.

We need to find the frequency of these waves.

We know that,

Frequency = no. of waves per second.

f=\dfrac{6}{9.1}\ Hz\\\\=0.65\ Hz

So, the frequency of these waves is equal to 0.65 Hz.

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This question is describing the following chemical reaction at equilibrium:

A\rightleftharpoons B

And provides the relative amounts of both A and B at 25 °C and 75 °C, this means the equilibrium expressions and equilibrium constants can be written as:

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Thus, by recalling the Van't Hoff's equation, we can write:

ln(K_2/K_1)=-\frac{\Delta H}{R}(\frac{1}{T_2} -\frac{1}{T_1} )

Hence, we solve for the enthalpy change as follows:

\Delta H=\frac{-R*ln(K_2/K_1)}{(\frac{1}{T_2} -\frac{1}{T_1} ) }

Finally, we plug in the numbers to obtain:

\Delta H=\frac{-8.314\frac{J}{mol*K} *ln(0.25/9)}{[\frac{1}{(75+273.15)K} -\frac{1}{(25+273.15)K} ] } \\\\\\\Delta H=4,785.1\frac{J}{mol}

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<h3>What is Thomson “plum-pudding” model?</h3>

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The options include the following:

a.The Rutherford experiment proved the Thomson “plum-pudding” model of the atom to be essentially correct.

b.The Rutherford experiment was useful in determining the nuclear charge on the atom.

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d.The electric discharge tube proved that electrons have a negative charge

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