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hash marks or lines running parallel with the casing, caused by the inside of the barrel of the gun as the bullet travels out when fired
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∙ 14y ago
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How can you tell if a bullet came from a gun?
science, Bullet markings and check them with the rifling of the firearm. Barrel twist and or markings can help ID the gun fired from. Nothing can tell you for sure, It can just tell you it was fired from a barrel like that of a type or make.
How can you trace a criminal by a bullet?
When a bullet is fired from a rifled firearm, the rifling leaves marks on the bullet. Those marks are unique to that gun, and no other gun makes exactly the same marks. If a bullet (or fired cartridge casing) is recovered from a crime scene, and we suspect that YOUR gun was used to commit this crime, then a sample bullet is fired from your gun, and compared to the crime scene bullet. A comparison microscope is used to compare the bullets, or marks made on the fired cartridge case by the extractor and firing pin.
Which has more momentum a train at rest or a bullet fired from a gun?
A bullet fired from a gun
How do you determine the caliber and type of firearms from which it was fired?
Assuming you refer to a fired bullet, you would examine the bullet- measure it's diameter, length, weigh it, and compare those to known specimens. You would also examine the bullet for striations- markings made by the rifling inside the barrel. The number and direction of twist of the striations may indicate a particular make of firearm.
How does ballistics help police solve crimes?
Rifling marks, the marks etched into a bullet as it travels through a gun's barrel, are to a gun as fingerprints are to a person. To see if a fired round came from a particular gun, the gun is test fired into a pool of water (to stop the bullet without changing its shape) then the marks on the test fired bullet and the bullet in question are compared. Knowing the trajectory of a bullet points you in the direction of its origination. There are also some clues that will help you determine from how far a shot was fired, such as approximate speed on impact and the presence of burnt gunpowder.
When a bullet is fired upwards vertically it gains?
When a bullet is fired upwards vertically it gains kinetic energy.
A bullet dropped versus a bullet fired from a gun which has greater acceleration?
The bullet fired from a gun has greater horizontal acceleration. For vertical acceleration, they are both the same.
Is a bullet fired into a gel or into what material when trying to identify the gun a bullet is fired from?
I used gelatin or a large water tank.
Where does a bullet goes after fired to the sky?
When a bullet is fired into the sky, it will eventually stop becasue it has run out of energy and fall back to the ground.
If a bullet was fired down through the earth's atmosphere how long would it take and how fast would it be?
That would depend on the mass of the bullet, the bullet's velocity when it left the barrel of the gun, and from how high up the bullet was fired from.
How do you identify a bullet ?
A BULLET is the projectile fired out of a CARTRIDGE. A bullet would be identified by it's measurements, weight, and shape. A cartridge would be identified by measurements, shape, and the headstamp- markings on the head of the case. The bullet itself (especially in the military) is often called a "ball" even though it may be spearhead-shaped, and the combination of bullet, cartridge, primer and powder as a unit is commonly called a ROUND of ammunition.
What are the grooves on a bullet?
Couple of different answers to your question. With a FIRED bullet, grooves that spiral around the bullet are ballistic markings- lines engraved by the rifling in the barrel. In the case of grooves that run around the bullet, and filled with a waxy substance, those are grease grooves that hold lubricant. A single groove with no filler is a cannelure- spot for the cartridge case to be crimped into to hold a bullet snugly before firing.
