3 years ago

The Doppler effect related change in wave frequency to what?

Chemistry

1 answer:

Irina18 [472]3 years ago

8 0

Answer:

Relative motion of source and observer.

Explanation:

Doppler Effect : It is the change in the observed frequency of the wave due to<em><u> relative motion of the source and object </u></em>.

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10 km/h is the correct answer

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3 years ago

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Different solutions of salt X are made up. What volume of: a) a 4 mol/dm³ solution contains 2 moles of X? b) a 6 mol/dm³ solutio

Gelneren [198K]

Answer:

a. 0.5dm³

b. 5x10⁻³dm³

Explanation:

a. A solution that is 4mol/dm³ contains 4 moles in 1dm³. The volume that contains 2 moles is:

2 moles * (1dm³ / 4mol) =

b. And for the 6 mol/dm³ containing 0.03moles:

0.03 moles * (1dm³ / 6mol) =

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A runner wants to run 10.4 km . She knows that her running pace is 7.6 mi/h .

vaieri [72.5K]

Answer:

The runner should run 51 minutes.

Explanation:

Distance wished by runner to cover = d = 10.4 km

Time taken by the runner to cover 10.4 km = T

Speed of the runner = 7.6 mile/hour

1 mile = 1.60934 km

1 hour = 60 min

$7.6 mile/Hour=\frac{7.6\times 1.60934 km}{1\times 60 min}=0.2038 km/min$

$Speed=\frac{Distance}{Time}$

$T=\frac{10.4 km}{0.2038 km/min}=51.0179 min\approx 51 minutes$

The runner should run 51 minutes.

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Aldehydes and ketones undergo acid-catalyzed reaction with alcohols to yield hemiacetals, compounds that have one alcohol-like o

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Answer:

See explaination

Explanation:

See attachment for the structure of the acetal that you would obtain by reaction of cyclopentanone with 1-propanol.

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