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MA_775_DIABLO [31]
2 years ago
12

A police siren passes you with a frequency of 5000 Hz. Which correctly describes the sound wave after the police car passes you?

The speed of sound is 340 m/s.
A. siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

B. siren wavelength of 0.0068 meters, frequency you hear = 5000 Hz

C. siren wavelength of 0.0068 meters, frequency you hear = more than 5000 Hz

D. siren wavelength of 5000 meters, frequency you hear = 5000 Hz
Chemistry
1 answer:
zmey [24]2 years ago
5 0

Answer:

siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

Explanation:

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A student who is performing this experiment pours an 8.50 mL sample of the saturated borax solution into a 10 mL graduated cylin
belka [17]

Answer:

Ksp = 0.1762

Explanation:

Applying

a) moles of HCl added, n= CV=0.5×0.012 = 6×10-3mol

b) since 0.006mol is present in 0.012dm3 of HCl

It implies moles of borax

C) Concentration = 0.706M

Ksp = [0.5]^2[0.706]= 0.176

6 0
3 years ago
A force of 25 newtons is exerted over an area of 50 square meters. Calculate
snow_lady [41]

Answer:

the pressure exerted in pascals is 0.5 Pa

Explanation:

The computation of the pressure exerted in pascals is shown below:

As we know that

Pressure = force ÷ area

= 25 ÷ 50

= 0.5 Pa

Hence, the pressure exerted in pascals is 0.5 Pa

We simply applied the above formula so that the correct pressure could come

4 0
3 years ago
You have two compounds that you have spotted on the TLC plate. One compound is more polar than the other. You ran the TLC plate
goldenfox [79]

Answer:

we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf

Explanation:

when we run a TLC plate in a 50/50 mixture of hexanes and ethyl acetate we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf

The speed of the polar spot depends largely on the level of polarity, an increase in the polarity will see both spots of Neat hexane run when we run a TLC  plate in a 50/50 mixture of hexanes and ethyl acetate

3 0
3 years ago
Why do you think we use heat to dissolve sodium tetraborate?
xxTIMURxx [149]

Answer:

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3 0
3 years ago
What factors affect freezing-point depression of a solution? (select all that apply)
ANTONII [103]

Answer:

A and F i think

Explanation:

Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all lower than that of the pure solvent and is directly proportional to the molality of the solute

8 0
3 years ago
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