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3 years ago

10. The repair order is a legal document because

Engineering

1 answer:

babymother [125]3 years ago

4 0

I think it’s B.) it’s signed by the customer

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This is it dont anwser this is for my other account

Nezavi [6.7K]

Answer:

thanks for the poiunts

Explanation:

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3 years ago

The function below takes two string parameters: sentence is a string containing a series of words separated by whitespace and le

Eddi Din [679]

Answer:

def extract_word_with_given_letter(sentence, letter):

words = sentence.split()

for word in words:

if letter in word.lower():

return word

return ""

# Testing the function here. ignore/remove the code below if not required

print(extract_word_with_given_letter('hello HOW are you?', 'w'))

print(extract_word_with_given_letter('hello how are you?', 'w'))

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3 years ago

Does anyone have cumulative exams today or tomorrow?(There so boring!)

IRINA_888 [86]

Answer:

I do!!

Explanation:

I have to sit for 3 hours lol‍♀️

3 0

3 years ago

Read 2 more answers

Determine the speed of sound in air at 400 K. Also determine the Mach number of an aircraft moving in the air at a velocity of 3

Reika [66]

Answer:

$\alpha = \sqrt{1.4 *0.287 \frac{KJ}{Kg K}*\frac{1000J}{1KJ} *400 K}= 400.899 m/s$

$Ma= \frac{310 m/s}{400.899 m/s}= 0.773$

Explanation:

For this case we have given the following data:

$T= 400 K$ represent the temperature for the air

$v = 310 m/s$ represent the velocity of the air

$k = 1.4$ represent the specific heat ratio at the room

$R = 0.287 KJ/ Kg K$ represent the gas constant for the air

And we want to find the velocity of the air under these conditions.

We can calculate the spped of the sound with the Newton-Laplace Equation given by this equation:

$\alpha = \sqrt{\frac{K}{\rho}}=\sqrt{k RT}$

Where K = is the Bulk Modulus of air, k is the adiabatic index of air= 1.4, R = the gas constant for the air, $\rho$ the density of the air and T the temperature in K

So on this case we can replace and we got:

$\alpha = \sqrt{1.4 *0.287 \frac{KJ}{Kg K}*\frac{1000J}{1KJ} *400 K}= 400.899 m/s$

The Mach number by definition is "a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound" and is defined as:

$Ma=\frac{v}{\alpha}$