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.
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I think this answer is False because i believe the right lane is the slowest lane you could be in.
Answer:the answer is B
Explanation: just took the quiz
Answer:
3.3 mm
Explanation:
The electric shaver is vibrating back and forward covering a distance of 2 mm, therefore, the amplitude of this vibration is always the half of the distance.
So the expression to use is:
A = D/2
A = 6.6 / 2 = 3.3 mm
Now, suppose you want the speed of this vibration:
V = 2πfA
V = 2π * 235 * 0.0033
V = 4.87 m/s