As verbs the difference between swipe and wipe

is that swipe is to steal or snatch while wipe is to move an object over, maintaining contact, with the intention of removing some substance from the surface (cf rub).

Hereof, What is the difference between blood spatter and splatter?

To spatter means to scatter small particles of a substance. A spatter is the pattern of drops that result from spattering. To splatter means to scatter large particles of a substance. A splatter is the pattern of drops that result from splattering.

How does surface affect blood spatter? The texture of the target surface upon which a drop of blood falls affects the size and shape of the bloodstain pattern. Hard, nonporous surfaces will produce circular stain patterns that have smooth edges, but softer, porous surfaces will produce spatter stains that are scalloped or have rough edges.

## What does high velocity blood spatter look like?

High velocity blood spatter:

The force of the blood hitting a surface for high velocity blood spatter is over 100 feet per second. This causes the pattern of the blood to be similar to a fine spray. Each tiny droplet in a high velocity blood pattern less than 1mm in diameter.

## What is the angle of impact of a blood spatter?

In a bloodstain measuring 0.04 by 0.16 inches (1 by 4 millimeters), the impact angle comes out to about 14.5 degrees. If the bloodstain has a tail, as can occur in droplets striking a surface at certain angles and speeds, it should be left out of this calculation [sources: Dutelle, Eckert and James].

## What causes medium velocity blood spatter?

A medium velocity spatter is a result of a force anywhere from five to a hundred feet per second . This type of splatter can be caused by a blunt force such as a baseball bat or an intense beating. This type of spatter is usually no more than four millimeters. This type of spatter can also be a result of a stabbing.

## How do you find the angle of blood spatter?

Angle of Impact
1. Measure the length and width of the splatter.
2. Divide the width of the splatter by its length.
3. Determine the arcsin of that number, typically using a calculator with an arcsin function.

## What is low velocity blood spatter?

A low velocity spatter is usually four to eight millimeters in size and is often a result of dripping blood after a victim sustains an injury such as a stab or in some cases a punch. For example, if a victim is stabbed and then walks around bleeding, the drops of blood that are left behind are low velocity.

## What is the angle of impact of a blood spatter?

In a bloodstain measuring 0.04 by 0.16 inches (1 by 4 millimeters), the impact angle comes out to about 14.5 degrees. If the bloodstain has a tail, as can occur in droplets striking a surface at certain angles and speeds, it should be left out of this calculation [sources: Dutelle, Eckert and James].

## What is angle of impact?

The angle of impact is a mechanics concept that defines the acute angle formed by the plane tangent to the ground surface and the tangent to the trajectory. One very useful application is in bloodstain pattern analysis, where the angle of impact has to be computed for each blood spatter.

## What is the difference between a wipe and a swipe?

As verbs the difference between swipe and wipe

is that swipe is to steal or snatch while wipe is to move an object over, maintaining contact, with the intention of removing some substance from the surface (cf rub).

## What is the angle of impact?

The angle of impact is a mechanics concept that defines the acute angle formed by the plane tangent to the ground surface and the tangent to the trajectory. One very useful application is in bloodstain pattern analysis, where the angle of impact has to be computed for each blood spatter.

## What is blood spatter analysis used for?

Bloodstain Pattern Analysis (BPA) is the study and analysis of bloodstains at a known or suspected crime scene with the purpose of drawing conclusions about the nature, timing and other details of the crime. It is one of the several specialties of forensic science.

## How does drop height affect splatter diameter?

The first hypothesis that the higher the blood is dropped from, the bigger the spatter it will create is correct. Since there is more time due to the greater height there is more impact from gravity pulling the drop down which makes the drop gather more speed so it hits the surface with more force.

## What factors affect blood spatter patterns?

Bloodstain Characteristics
• Many factors affect the size and shape of the blood drops.
• In addition to droplet volume, distance of fall and the blood source surface characteristics, other factors affect the size, shape and appearance of the bloodstains.

## What factors affect blood spatter patterns?

Bloodstain Characteristics
• Many factors affect the size and shape of the blood drops.
• In addition to droplet volume, distance of fall and the blood source surface characteristics, other factors affect the size, shape and appearance of the bloodstains.

## What two forces does a blood droplet experience as it falls?

Empty spaces in spatters that indicate that something (or someone) caught the spatter instead of the surrounding surfaces. Stippling. Burns or gunpowder on a victims skin from a gunshot at close range. Internal muzzle staining. When explosive gases from a gunshot cause blood to be pulled into the muzzle of a gun.

## What two forces does a blood droplet experience as it falls?

gunshot. Describe the drawback effect. When the victim’s blood back spatters onto the gun or shooter, it places them at the scene of the crime. when a blood-covered object flings blood in an arc onto a nearby surface. cast-off.

## Does blood spatter when you get shot?

These are usually caused by gunshot wounds, but they can also result from explosions, power tools or high-speed machinery. These fast-moving drops leave stains measuring less than 0.04 inches (1 millimeter) across. Bullet wounds can produce both back and front spatters.

## What can dried blood tell an expert?

Dry blood samples can detect both antibodies and hepatitis virus RNA successfully. It involves obtaining a few drops of blood by fingerprinting, and letting them dry on a specially specific absorbent paper card.

## What are the 4 types of passive bloodstains?

• Passive. a. formed from the force of gravity acting alone. b. subdivided (drops, drip patterns, pools, clots) c. oozing or gushes from the body, dripping finger or arm, drops from a knife.
• Transfer. a. wet bloody surface comes in contact with a secondary surface. b. wipe, smudge, swipe or smear. c.
• Projected blood spatter.

## What is blood cast?

blood cast. a cast usually formed in renal tubules, but may occur in bronchioles; consists of inspissated material that includes various elements of blood (that is, erythrocytes, leukocytes, fibrin, and so on), resulting from bleeding into the glomerulus or tubule, or into the alveolus or bronchiole.

## What defines a passive bloodstain?

Passive bloodstains are drops created or formed by the force of gravity acting alone. Passive bloodstains can be further subdivided to include drops, drip patterns, pools, and clots.

## What is a transfer pattern?

Blood 5: Transfer Bloodstains. Background: A transfer bloodstain is created when a wet, bloody surface comes in contact with a secondary surface. A recognizable image of all, or a portion, of the original surface may be observed in the pattern, as in the case of a bloody hand or footwear.

## What are the 4 types of passive bloodstains?

• Passive. a. formed from the force of gravity acting alone. b. subdivided (drops, drip patterns, pools, clots) c. oozing or gushes from the body, dripping finger or arm, drops from a knife.
• Transfer. a. wet bloody surface comes in contact with a secondary surface. b. wipe, smudge, swipe or smear. c.
• Projected blood spatter.

## What are the 4 types of passive bloodstains?

Blood forms a spherical shape (perfect circular shape) almost immediately upon separating from the blood source. The spherical shape is caused by the surface tension of the blood. Surface Tension causes the blood drop to pull itself in; both horizontally and vertically.

## What is a drip pattern?

A drip pattern is a type of bloodstain pattern that is created when blood droplets impact another liquid, such as blood, to form a pattern that contains a parent stain with surrounding satellite spatter (Fig.

## What is the difference between spine and satellite?

Spine: This type of stain has pointed and elongated shapes, which radiate away from the center. Satellite: This type of splatter shows small drops of blood that are distributed around a pool of blood. Swipe: This occurs when the blood is moved from the source onto a surface that has not been stained yet.

## What is a passive drop?

Passive drops are drops of blood that are formed under the influence of only gravity. This is often observed in incidents involving moving injured persons. Pool pattern. A pool pattern forms when blood has flowed in one place for some time, such as when a bleeding victim stayed there for a period of time.

## What is the difference between forward and backward spatter?

Answer: Forward spatter is projected outward and away from the source; back spatter consists of the blood projected backward from the source. Back spatter is more likely to be deposited on the object or person creating the impact.

## What are passive bloodstains?

Spine: This type of stain has pointed and elongated shapes, which radiate away from the center. Satellite: This type of splatter shows small drops of blood that are distributed around a pool of blood. Swipe: This occurs when the blood is moved from the source onto a surface that has not been stained yet.

## How far can blood spatter travel?

Overall, the results indicated that the application of kinetic energy of between 1 and 5 J at a height of 1780 mm led to the blood droplets travelling a maximum horizontal distance of 5361 mm (and average maximum distance of 4981 mm).

## What is a transfer pattern?

Passive bloodstains are drops created or formed by the force of gravity acting alone. Passive bloodstains can be further subdivided to include drops, drip patterns, pools, and clots.