What is the Newton’s Law of Cooling?
That the temperature of a corpse varies proportionally with the environments temperature.
What variables in your problem correspond with the variables in the Newton’s Law of Cooling?
The environment
Temperature of the corpse
According to this Law, at what time approximately the death happened?
WHAT DEATH :o /It is in my homework! =)
How does the room temperature affect the time of death?
Because the temperature changes proportionally to it.
How does an illness (e.g. fever) affect the time of death?
It affects the time of death because you have to look at what temperature does the corpse was before he/she died.
How exact is the approximation of the Newton’s Law of Cooling for predicting the time of death?
Pretty close, but like it says its an approximation =(.. a good approximation =)
domingo, 25 de febrero de 2007
Our ProbLeM! =)
Jest murder resolve group!
The dead body of professor H was found at the classroom at 6:50 am Friday, March 26th, 2007. The police determined that the cause of the death was a lethal injection with a substance that causes immediate death upon entering the bloodstream. The syringe was found at the scene with Miss X fingerprints on it. Needless to say, Miss X is a prime suspect. In fact, two reliable eyewitnesses at the school saw Miss X near the classroom at 7 am that same day. Miss X's alibi of being in Mr. R´s office can be verified, but only from 6 to 6:30am. Determine Miss X's innocence or guiltiness, attempt to determine whether or not the crime was committed after 6:50am.
Additional Facts:
-Miss X is in a community service at a clinical chemistry lab, and she is the one in charge of disposing used syringes.
-All DNA evidence in this case has been thrown out due to multiple lab errors.
-To determine the Algor Mortis, at 6:50 am, when the body of the professor was found, its temperature was 96 degrees. The body temperature was recorded again at 6:56 am and found to be 95 degrees.
-The classroom room temperature on night was recorded to be 75 degrees at 6 am, and 70 degrees at 7 am.
-Three days before the murder, the professor visited a physician, at which time the professor's body temperature was recorded at exactly 101 degrees.
-On the morning of the murder, before coming to work, the professor wrote the following journal entry:
"I have felt terrible ever since I had that horrible incident with one of my Heat students. What was his name, was it John? And for the past few days, I have had this terrible fever. I finally feel better today, not 100 percent, but nearly back to normal."
The dead body of professor H was found at the classroom at 6:50 am Friday, March 26th, 2007. The police determined that the cause of the death was a lethal injection with a substance that causes immediate death upon entering the bloodstream. The syringe was found at the scene with Miss X fingerprints on it. Needless to say, Miss X is a prime suspect. In fact, two reliable eyewitnesses at the school saw Miss X near the classroom at 7 am that same day. Miss X's alibi of being in Mr. R´s office can be verified, but only from 6 to 6:30am. Determine Miss X's innocence or guiltiness, attempt to determine whether or not the crime was committed after 6:50am.
Additional Facts:
-Miss X is in a community service at a clinical chemistry lab, and she is the one in charge of disposing used syringes.
-All DNA evidence in this case has been thrown out due to multiple lab errors.
-To determine the Algor Mortis, at 6:50 am, when the body of the professor was found, its temperature was 96 degrees. The body temperature was recorded again at 6:56 am and found to be 95 degrees.
-The classroom room temperature on night was recorded to be 75 degrees at 6 am, and 70 degrees at 7 am.
-Three days before the murder, the professor visited a physician, at which time the professor's body temperature was recorded at exactly 101 degrees.
-On the morning of the murder, before coming to work, the professor wrote the following journal entry:
"I have felt terrible ever since I had that horrible incident with one of my Heat students. What was his name, was it John? And for the past few days, I have had this terrible fever. I finally feel better today, not 100 percent, but nearly back to normal."
jueves, 22 de febrero de 2007
lunes, 19 de febrero de 2007
Murder we wrotE! (Questions 4-7)
Questions 4 to 7....
What methods are commonly used to find the time of death?
1. The rate method. Measuring the change produced by a process which takes place at a known rate which was either initiated or stopped by the event under investigation, i.e. death. Examples include the amount and distribution of rigor mortis, the change in body temperature, and the degree of putrefaction of the body.
2. The concurrence method. Comparing the occurrence of events which took place at known times with the time of occurrence of the event under investigation, i.e. death. For example, a wrist watch stopped by a blow during an assault, the extent of digestion of the last known meal.
What factors are considered in Algor Mortis?
Environment
Temperature of the body
How does the environment affect the time of death?
Newton's law of cooling states that the rate of cooling of a body is determined by the difference between the temperature of the body and that of its environment.
What can you tell about the different methods of temperature reading of the body? Do they make a difference in the results?
I think that its really hard to find the exact time of death because there are a lot of factors that may vary. I think that Algor Mortis is the closest one in guessing or approximating the time of death because the main factor affecting the corpse is the environment and in Algor mortis is the first thing take in notice. =)
What methods are commonly used to find the time of death?
1. The rate method. Measuring the change produced by a process which takes place at a known rate which was either initiated or stopped by the event under investigation, i.e. death. Examples include the amount and distribution of rigor mortis, the change in body temperature, and the degree of putrefaction of the body.
2. The concurrence method. Comparing the occurrence of events which took place at known times with the time of occurrence of the event under investigation, i.e. death. For example, a wrist watch stopped by a blow during an assault, the extent of digestion of the last known meal.
What factors are considered in Algor Mortis?
Environment
Temperature of the body
How does the environment affect the time of death?
Newton's law of cooling states that the rate of cooling of a body is determined by the difference between the temperature of the body and that of its environment.
What can you tell about the different methods of temperature reading of the body? Do they make a difference in the results?
I think that its really hard to find the exact time of death because there are a lot of factors that may vary. I think that Algor Mortis is the closest one in guessing or approximating the time of death because the main factor affecting the corpse is the environment and in Algor mortis is the first thing take in notice. =)
jueves, 8 de febrero de 2007
lunes, 5 de febrero de 2007
mUdER wE wRotE! xD
1&2) FinaL proJect Team:
JMRG!../"Jest Murder resolve group!"/
mEdiA eXpERt - oF couRsE GeoRGe! =)MaTh "eXpErT!" - mE xD
fOrensIC sCienTisT - riCky =O
JournALisT-GiseLLe! xD oVioUslY
3) tHe pRocEsS /
1. What is forensic science? thE aRt of crEatIng aN aRGumEnt baSEd UpOn rEasOniNG anD evIDenCe.
2. What kind of evidence can be collected in a murder case?
bIoLogiCaL...TrACE eVideNCe.. iMpreSSioN sucH aS fiNgER prinTs foOtweAR iMpresSioNs tiRe traCkS..coNtroLed SubStanCes...TissuEs.. SemEn saMplE..bLoOD saMpLE
3. Why is important to determine the time of death?
bEcaUsE iF yoU kNOw thE tiMe oF deAtH yoU caN fiNd poSsiBLe suSpEcTs anD wiTh pOsSiBLe suSpEcTs yoU caN finD thE cRImiNaL! :O
4) I thinK thaT wiTh thE heLp of cAlcuLus we WiLL soLve "thE muRdeR caSe" anD as iN thE dEscRipTioN of thE fiNaL projEct saYs it wiLL intRoduCe uS tO thE woRLd oF fORenSic sCiEncE, tO pracTice acCumULatiNG daTa, anD utiLizE aLL wE haVE bEEn LeaRniG throuGh HiGH sChOOL, anD i THinK onE oF thE obJectiVes iS tO haVe fuN duRinG thE coURse! =)!! ..
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