Due to its irregular atomic structure when the glass is broken it produces a variety of fracture patterns. The fracture lines will be wavy and the glass will most likely break toward the heat.
Copy Of Glass Fracture Patterns Worksheet Glass Fracture Patterns Worksheet 1 Examine The Diagrams Below That Show A Side View Of A Window Both Course Hero
Examine the diagrams below that show a side view of a window both before and after impact.
. Calculate the density of glass. Tap card to see definition. By the end of this activity you will be able to.
A reference piece of glass about 1 square inch should be taken. Tare beaker with water. Angela is analyzing the fracture pattern of a window.
2nd Concentric Fractures Concentric circles that have the same center. Window Glass 253-254 gml Pyrex Glass 229-239 gml. Examine the diagram of the glass fracture patterns below.
Tempered glass is also known as safety glass. She notes that the cracks stop when they intersect. Heat fractures are different from impact fractures.
Although the examination of a single crack may indicated a degree of similarity the overall composition and shape of cracks in these two types of glass differ significantly. The glass is called an amorphous solid because its atoms are arranged randomly Figure 14-1. Examine the diagrams below that show a side view of a window both before and after impact.
If you examined the actual glass could you determine who was telling the truth. ACTIVITY 14-1 GLASS FRACTURE PATTERNS Procedure. This study documented the controlled fracture patterns of 60 glass panes 60 glass bottles and 60 plastic tail light lens covers using both dynamic impact and static pressure methods under closely controlled conditions.
Up to 24 cash back Explain two different methods to determine the direction of the bullets based on glass analysis. Academiaedu is a platform for academics to share research papers. The contact area of the glass with the conveyor is small enough that it doesnt negatively impact the process - all throughout the surface the stress is introduced in sufficient amount but the amount of stress applied differs by the openness of.
Fracture patterns are unique. Low-velocity projectiles produce cracks in the glass which radiate outward from. 1st Radial Fractures Start at the point of impact and radiate move outward from there.
The radial fracture originates on the surface opposite to that on. What are glass fracture patterns. It found in many shapes size colour and types.
Up to 24 cash back Fractures. Analyze glass fracture patterns and determine the order of the breaks in the glass. Remove piece of glass closest to impact site 2.
Force originated from opposite side of right angle. 1st Radial Fractures Start at the point of impact and radiate move outward from there. The notes will be submit to the instructor by the end of.
By the end of this activity you will be able to. Draw an arrow indicating the direction in which the force was applied to the window. A discussion is presented of the forensic interpretation of annealed glass fracture.
By the end of this activity you will be able to. SUSPEND the glass in water. Use glass fracture patterns to explain how to sequence events that occurred to form the broken glass.
Form on the side opposite the point of impact. Calculate density of the glass. Tap again to see term.
TYPES OF CRACKS 1 Radial cracks. Find Volume of glass. Find right angle at extreme edge of radial fracture 5.
Analyze glass fracture patterns and determine the order of the breaks in the glass. Form on the same side of the glass as the point of impact. Analyze glass fracture patterns and determine the order of the breaks in.
The main objective of this activity is for students to get student to analyze and interpret glass analysis data and fracture pattern in order to determine what happen at a crime scene. What type of fracture pattern has a curved surface. A hard brittle amorphous.
ACTIVITY 14-1 GLASS FRACTURE PATTERNS Procedure. Crack in glass that sticks out. How many perpetrators there were bwhat type of object broke the glass cthe order in which the fractures occurred dhow long ago the glass was broken.
Three different impacts resulted in the breaking of the glass. Mass of water displaced Volume of water displaced Volume of piece of glass. The EJ207 engine had multi-point fuel injection with an injection and firing order of 1-3-2-4.
When an object has been thrown through a glass pane a fracture forming a pattern somewhat like a spider-web will be seen. Describe how glass fractures. Explain how glass is used as evidence.
Provide examples of different kinds of glass. Determine the point of impact and direction of force. Up to 24 cash back ACTIVITY 14-1 GLASS FRACTURE PATTERNS Procedure.
The processes of glass fracture are given the nature and formation of glass as a brittle isotropic solid is discussed and the mechanical strength of glass is considered in terms of its atomic bond strengths and external flaws. Examine edge for Wallner lines 4. Glass Fracture Patterns Worksheet 1.
Explain your answer using the terms tension and compression. Tie thread around glass. 45866_14_c14_p394-429indd 416 12107 65416 AM ACTIVITY 14-1 GLASS FRACTURE PATTERNS Objectives.
Locate edge corresponding to radial fracture break site 3. Click card to see definition. As far as i know there are no heating elements on the window section in the picture.
Why Radial Concentric Fractures Form. Analyze glass fracture patterns to determine how glass was broken. Use glass fracture patterns to explain how to sequence events that occurred to form the broken glass.
Low-velocity impact fractures 7211. Up to 24 cash back 416 Glass Evidence ACTIVITY 14-1 GLASS FRACTURE PATTERNS Objectives. Circle around point of impact.
Mass the piece of glass. Low-velocity impact high-velocity impact and thermal fractures may be observed in glass and can be differentiated. Day-1-Students will first watch the video lecture or power-point glass analysis and take summary notes.
Use the refractive index to identify different types of glass. Find Volume of glass. The cracks will appear radiating outwards from the point of impact making a star shaped fracture known as radial fracture.
Describe the characteristics of glass. This has been answered before but there was no explanation given for the curve. Knowing this what can she determine about the window.
Determine the point of impact and direction of force. Activity 14-1 glass fracture patterns answers Written By flythe Sunday March 6 2022 Add Comment Edit. Label the point of impact and draw an arrow indicating the direction in which the force was applied to the window--- Before Impact After Impact 2.
Plain glass will yield true radial and concentric fractures which are similar to the sketch above. Up to 24 cash back Of A Small Piece of Glass 1. There wont be any radial or concentric fractures of glass wasnt broken before the heat fracture.
Each pattern was intercompared and based on the limited specimens tested in this study the results illustrate that the. Click again to see term. Materials that do not have fracture planes such as glass and.
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