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2 years ago

10

Alcohol is being heated on the stove and distillates at 172.4⁰F . What is this temperature on the Celsius degree?

1 answer:

melomori [17]2 years ago

3 0

Answer: The head temperature rises as the vapors of lower-boiling compound fill the distillation head. The temperature drops because the lower-boiling compound finishes distilling before vapors of the higher-boiling compound can fill the distillation head, which then cause the head temperature to rise.

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A person can run 400m in 72 s.. At what speed are they running

rewona [7]

Speed = distance/time
= 400/72
=5.55 m/s

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3 years ago

Which equation best summarizes Newton’s 2nd law:

zepelin [54]

Option B makes best sense, correct me if i’m wrong

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3 years ago

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. A pipe closed at both ends can have standing wav

uranmaximum [27]

Answer:

68.8 Hz

137.6 Hz, 206.4 Hz

Explanation:

L = Length of tube = 2.5 m

v = Velocity of sound in air = 344 m/s

Distance between nodes is given by

$L=\dfrac{\lambda}{2}+m\dfrac{\lambda}{2}\\\Rightarrow \dfrac{\lambda(n+1)}{2}=L\\\Rightarrow \lambda=\dfrac{2L}{n+1}$

Where n = 0, 1, 2, 3, ...

Making n+1 = n

$\lambda=\dfrac{2L}{n}$

where n = 1, 2, 3 .....

For fundamental frequency n = 1

$\lambda=\dfrac{2\times 2.5}{1}\\\Rightarrow \lambda=5\ m$

Frequency is given by

$f=\dfrac{v}{\lambda}\\\Rightarrow f=\dfrac{344}{5}\\\Rightarrow f=68.8\ Hz$

The fundamental frequency is 68.8 Hz

First overtone

$2f=2\times 68.8=137.6\ Hz$

Second overtone

$3f=3\times 68.8=206.4\ Hz$

The overtones are 137.6 Hz, 206.4 Hz

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3 years ago

MariettaO [177]

Answer:

true

Explanation:

yes because I said so

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2 years ago

Electrical metallic tubing would be used in an electrical installation because it

maw [93]

Hey There!

Electrical metallic tubing would be used in an electrical installation because it <span>is less expensive.</span>

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3 years ago

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