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2 years ago

What is used to measure alcohol in the blood

Engineering

2 answers:

Natali5045456 [20]2 years ago

5 0

Answer:

your doctor uses a needle to take blood from your arm and measure the level of alcohol

Explanation: there are also other tests such as urine test and breathalyzer tests

const2013 [10]2 years ago

3 0

Answer:

When you think of a blood alcohol test, you might picture a Breathalyzer at a traffic stop. But you might need one for other reasons, too. And there’s more than one type.

Explanation:

To check your blood for alcohol, your doctor uses a needle to take blood from your arm and measure the level of alcohol. The other tests you might get for alcohol, like a breath or urine test, don’t use blood samples.

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Which of the following factors does not promote safety in the shop?

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3 years ago

An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 40MPa. It has been dete

Nataly [62]

Answer:

Yes, fracture will occur

Explanation:

Half length of internal crack will be 4mm/2=2mm=0.002m

To find the dimensionless parameter, we use critical stress crack propagation equation

$\sigma_c=\frac {K}{Y \sqrt {a\pi}}$ and making Y the subject

$Y=\frac {K}{\sigma_c \sqrt {a\pi}}$

Where Y is the dimensionless parameter, a is half length of crack, K is plane strain fracture toughness, $\sigma_c$ is critical stress required for initiating crack propagation. Substituting the figures given in question we obtain

$Y=\frac {K}{\sigma_c \sqrt {a\pi}}= \frac {40}{300\sqrt {(0.002*\pi)}}=1.682$

When the maximum internal crack length is 6mm, half the length of internal crack is 6mm/2=3mm=0.003m

$\sigma_c=\frac {K}{Y \sqrt {a\pi}}$ and making K the subject

$K=\sigma_c Y \sqrt {a\pi}$ and substituting 260 MPa for $\sigma_c$ while a is taken as 0.003m and Y is already known

$K=260*1.682*\sqrt {0.003*\pi}=42.455 Mpa$

Therefore, fracture toughness at critical stress when maximum internal crack is 6mm is 42.455 Mpa and since it’s greater than 40 Mpa, fracture occurs to the material

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