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2 years ago

The fine horizontal scratches etched onto a bullet after it has been fired are called?

Physics

1 answer:

GalinKa [24]2 years ago

4 0

The fine horizontal scratches etched onto a bullet after it has been fired are called Striations.

<h3>What is Striations?</h3>

Striations are the minute differences in the curve of the bullet's surface. The bullet and the gun barrel are the harder and softer materials, respectively, in firearms evidence.
The striations left on the fired bullet are used as a comparison by firearm examiners.
When a gun is discharged, the bullet blasts down the barrel where it strikes ridges and grooves, spinning and improving shot accuracy.
These ridges cause striations in the bullet's soft metal by digging into it.
An examiner analyses these distinctive markings to verify whether a given bullet was shot from a specific firearm.
A barrel will produce individual markings in addition to a bullet's land and groove impressions as the projectile passes through.

Learn more about Bullet here:

brainly.com/question/6669700

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A crane lifts a 1,750 kg mass using a steel cable whose mass per unit length is 0.88 kg/m. What is the speed of transverse waves

Sauron [17]

Answer:

139.6m/s

Explanation:

Calculate the tension first, T=m*g

mass(m): 1750kg, gravity(g): 9.8m/s^2

T= 1750*9.8

=17150N

Then calculate the wave speed using the equation v = √ (T/μ)

v= √(17150N)/(0.88kg/m)

=139.6m/s

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3 years ago

An ethernet cable is 3.80 m long and has a mass of 0.210 kg. A transverse pulse is produced by plucking one end of the taut cabl

Tasya [4]

Answer:

$T=94.54N$

Explanation:

The tension in a cable is given by:

$T=\mu v^2(1)$

Where $\mu$ is the mass density of the cable and v is the speed of the cable's pulse. These values are defined as:

$\mu=\frac{m}{L}(2)\\v=\frac{d}{t}$

The pulse makes four trips down and back along the cable, so $d=4(2L)$

$v=\frac{8L}{t}(3)$

Replacing (2) and (3) in (1), we calculate the tension in the cable:

$T=\frac{m}{L}(\frac{8L}{t})^2\\T=\frac{64mL}{t^2}\\T=\frac{64(0.21kg(3.80m))}{(0.735s)^2}\\T=94.54N$

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3 years ago

Express in words AND mathematically the relationship between…<br> Period and frequency

castortr0y [4]

Frequency = how many waves you get per sec
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Period = 1/frequency

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3 years ago

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adoni [48]

Answer:

By its amplitude.

Explanation:

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3 years ago

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victus00 [196]

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4 years ago