What is Investigation: Definition and 120 Discussions

Fire investigation, sometimes referred to as origin and cause investigation, is the analysis of fire-related incidents. After firefighters extinguish a fire, an investigation is launched to determine the origin and cause of the fire or explosion. Investigations of such incidents require a systematic approach and knowledge of basic fire science.

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  1. H

    Electromagnet investigation lab assignment

    Homework Statement An alpha particle enters a uniform verical magnetic field of 1.0 T with a velocity of 2.0m/s East. a) Find the force exerted on the particle by the field. b) Find the acceleration of the particle. c) Find the radius of curvature of the path of the particle. Homework...
  2. T

    Is it possible to pursue theoretical physics investigation if that's not my job?

    Hello, much probably my job won't be research in theoretical physics, but that's what I'd like to do. I'll get out of university with a master's degree in some area of physics. Is it possible to do research even if that's not my job? Does anybody do this?
  3. F

    Physics Issues Investigation on Nuclear Fusion or Fission question help

    Hello, I was just wondering if anybody could give me any ideas about a possible direction in a Physics issues investigation. I am looking at choosing one around nuclear energy and the issues of radiation. Any help or interesting sugestions of avenues in nuclear physics, and or possibe guiding...
  4. G

    Friction Lab Investigation: Changing the mass

    Homework Statement We have to investigate a factor that affects friction. For my expiriment, I placed a wooden block on a flat surface, and increased the force pulling the object using a Newton meter until the block moved. I increased the mass and the force required to pull it increased...
  5. R

    LDR Depth Meter Investigation

    1. The problem statement I'm currently conducting an investigation into how a Light Dependent Resistor changes depending on the depth of a liquid above it. The experiment is pretty simple, however the write up is somewhat more problematic. Firstly I'm asking whether I should read voltage...
  6. R

    Brushless DC Motor Investigation

    Hey guys, I'm new to this site, and am a university student studying Electrical and Electronics engineering. I just completed a design project controlling a BLDC motor (pretty low powered at 60V, and giving output rpm of about 6000rpm). Now I had an idea where instead of using a single BLDCM...
  7. S

    Uncovering the Mystery behind My Investigation: The Theory Review

    I have to finish my investigation and the outline has something called a Theory review. It defines it as: a story that generates interest in the reader for the field of your research and link to practical investigation to follow.:confused: Now this maybe very simple but I'm not sure what kind...
  8. P

    Practical Report For Investigation to flight (wind tunnel)?

    So we need to make a practical report and I'm not sure how to do it. I've learned the basics like lift equals weight and thrust equals drag.. and then the teacher made a model wind tunnel in class, we then got air speed(km/h) and its mass(g) etc. for it then we had to convert them to life and...
  9. L

    Heat Transfer Investigation

    hi, We had to do a prac. last week to investigate the effect of insulator materials on the heating of buildings. we did the prac, but unfortunately we didn't save our graph which shows the change in temperature with respect to time, for each of the different insulator. we had a...
  10. L

    Help with investigation topics/ideas.

    This term in physics we are being assessed on designing an experiment of our choice (and topic), obtaining the data and analyzing/concluding upon it. At my school this is known as an extended experimental investigation. Basically I am looking for some ideas or even topics that will have enough...
  11. A

    How Does Kinematics Influence Base Running Techniques in Baseball?

    Homework Statement I'm currently working on doing an investigation on the relationship between kinematics and base running techniques in baseball. I'm trying to find out if "rounding the bases" is better than running straight to each base and turning, but I haven't found how I should preform...
  12. S

    News CENTCOM investigation: Killed Reuters cameramen were in company of armed ins s

    CENTCOM investigation: Killed Reuters cameramen were in company of armed insurgents I note several threads on this subject have been closed by moderators. I believe this post meets PF guidelines, particularly with regards to citation. Yesterday, US CENTCOM released its 2007 investigation into...
  13. P

    Need a Topic For Experimental Investigation

    Hey everyone, New to the forum - I apologize if you already get heaps of posts like these... Im in Year 12 Physics, and out first assessment piece is related to the physics of sport. It's a typical physics project -> hypothesis, testing, report...etc We're looking at anything relating to...
  14. S

    Proving f is a Constant Function: A Mathematical Investigation

    Homework Statement Suppose that |f (x) - f (y)|  (x-y)^2 for all real numbers x and y: Prove that f is a constant function. Homework Equations No relevant equations.. The Attempt at a Solution I'm really stuck..i'm thinking you're suppose to use mathematical induction.?
  15. A

    Tackling YouTube's 'Physics' Mystery: An Investigation

    This video was featured on youtube's front page, sounds like BS, but I'm no physicist, so I coming here for some answers.
  16. J

    A Mathematical Investigation: -1 = 1?

    1 = -1 ! \sqrt{}a.\sqrt{}b = \sqrt{}ab When a = b = -1, \sqrt{}-1.\sqrt{}-1=\sqrt{}-1*-1 i*i = \sqrt{}1 = 1 i2 = 1 -1 = 1 Had i gone wrong anywhere??
  17. B

    Investigating Mechanics in Snooker Shots

    Hi Guys, Ok, I am taking on a mechanics investigation based around a snooker/pool/billiards style shot. I plan to model the ideal shot to get out of a snooker and pot a ball. In order to do this I plan to find the coefficient of friction between the table and the ball and the coefficient of...
  18. B

    Investigation of hydrogen-on-demand systems (HODS)

    Hi all, I just wanted to post some new links regarding a recent topic of large debate, the viability of these systems. Assuming that these systems were installed properly, then it appears that HODS do not work at all. From the Popular Mechanics website--Published on: August 7, 2008...
  19. E

    Investigation and experiment ideas

    I'm a high school physics teacher and my students have to design their own experiments based around electricity and electronics/photonics concepts. One group must do their experiment on basic circuits and electricity, and I've thought of a few example ideas for them: Measuring power use of a...
  20. C

    Investigation of resistance of Lightbulb

    Homework Statement I am currently carrying out an investigation into all the factors that affect the resistance of a lightbulb. Firstly, I have done a graph to show voltage against resistance for a 24W Lightbulb to see if Watts affect resistance, however my friends and teacher all told me to...
  21. T

    Exploring the Link between Heat and Temperature: A Junior Cert Investigation

    Hi everyone, I have an investigation to carry out for my Junior Certificate in Ireland. What I'm not sure about is the link between heat and temperature. I know that heat is energy, and temperature is the measurement of this energy, but I'm not sure what the link between celcius and joules is...
  22. A

    Investigation of Heat Radiation

    I am an advanced higher physics student and am doing my investigation on heat radiation. I have made a heating element out of constantan and am running 2.8 amps at 12 volts through it. I set up a cube container parallel to the heating element at a distance of 15 mm that contains 1.2 litres of...
  23. D

    Investigation into infinite limits

    I was looking into infinite limits and sequences and looked at the Limit Lim {f(n+1)/f(n)} n->∞ I was looking to see if there were any significant patterns and i couldn't even solve. It was proposed to me by a friend am I just having a bad case of limit block or is it as...
  24. I

    Some probem in my salters investigation

    i m doing the kinetic of iodine and propanone in acid condition using colorimeter and observing the absorbance and initially i don't think i will need a calibration curve becos absorbance is poprptional to concentration and i only need to look the shape of the graph to determine the order of the...
  25. G

    Investigating Color in My Chemistry Lab

    in my chemistry lab we had a kind of color test. the thing was supposed to come as blue according to the lab manual. . It did not. to me there was no color.however my teachers forced me to believe what i was looking at was blue,supposedly "it is very faint". that was not mentioned in the...
  26. G

    Investigating Color in Chemistry Lab: My Experience

    in my chemistry lab we had a kind of color test. the thing was supposed to come as blue according to the lab manual. . It did not. to me there was no color.however my teachers forced me to believe what i was looking at was blue,supposedly "it is very faint". that was not mentioned in the...
  27. J

    Motors & Generators practical investigation ideas

    Hey everyone I'm a physics student doing my last year of high school in Australia. For an assessment task I have to do a practical investigation on electric motors and generators but I am a bit lost on this subject. I need a few ideas that are easy to understand and prove/disprove using a...
  28. B

    Exploring the Paraboloid: A Parametric Surface Investigation

    Homework Statement Consider the parametric surface r(u,v)=<vsinu, vcosu, v^2> a) Identify the shape of the surface b) The point (1,1,2) is on the surface. Find: i) A grid curve wit hv constant that contains this point ii) A grid curve with u constant that contains this point c)...
  29. T

    Investigation: Mechanical Energy in a Pendulum

    Homework Statement a pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position and the lowest point of the pendulum's swing. The mass of the pendulum bob was determined on an electromic scale, and its diameter was measured using...
  30. K

    Balancing Magnetic & Gravitational Forces: A Current-Balance Investigation

    1. The following information describes a current-balance investigation. The current in the solenoid that generates the magnetic field was held constant and the length of wire in the end of the loop in the field was 0.050 m long. i168.photobucket.com/albums/u173/pleasetheworld/p3.jpg a)...
  31. M

    What are some ideas for an Advance Higher Physics investigation?

    Next year I have to do and Investigation for Advance higher physics. I was wandering if anyone had any ideas on what I could do it on. I don't want it to be as basic as measuring the refractive index but not as hard as to split and Atom:eek:. Iwould like to here anyones ideas.
  32. B

    Payphone Mechanics: An Investigation

    The pay phones in which we have to drop the coin in and then we are able to make calls. These are often evident at railway stations and other places. Does anyone have any idea as to how they work?
  33. wolram

    Air Crash Investigation: A Technical Journey and an Emotional Rollercoaster

    Just for the technical side i like to watch air crash investigation, it has all ways been an interest to me as to how things can fail, but i seem to be getting all sissy and weeping watching the programs, surly this not natural for a male.
  34. A

    Can anyone explain the derivation of the formula for cantilever oscillations?

    [SOLVED] Cantilever Investigation 1.Hi, I am writing a report on cantilever oscillations, my experiment involves fixing different cantilvers e.g. a ruler to the end of a table then measuring the period and height of oscillations while varing the mass attached to the cantilever, and other...
  35. P

    Investigating Bouncing Ball: Height vs Time

    Homework Statement Drop the ball you have been given and watch it bounce: once and rebound, twice and so on. What could we measure in this process? What variables could change? What would change? Now investigate anyone aspect of the bouncing of the ball. This is my research question: How...
  36. A

    Extended Experimental Investigation.

    My teacher has given me a Extended Experimental Investigation to do that requires physics. I know a bit about it (the very basics) and I'm not sure on a few things about it. For my task I have forgotten to measure my displacement and I was wondering if anybody knew a way I could still find it...
  37. G

    Advanced Higher Physics Investigation

    As part of my Advanced Higher Physics course I am require to investigate an area of physics not covered by the syllabus. My first thought was to use telron tubes or similar in order to determine the charge to mass ratio of an electron. However it has just come to my attention that this has in...
  38. G

    How do weight, surface area, and speed affect the force of friction?

    Investigation: Factors Affecting Friction Design and complete an investigation to determine how the following factors affect the force of friction: -Wieght - Surface Area -Speed You will need to measure the magnitude of the force of friction. Since the magnitude of the force that...
  39. P

    Using physics in accident investigation

    i have an assignment in physics due tommorrow and i would really appreciate it if someone could explain to me how acceleration, velocity and displacement are used to investigate accidets. Or if you know of any great sites i could go on to find this information would be very helpful. please...
  40. C

    Sand/rice/gravel trap investigation

    Homework Statement I have recently carried out an investigation on how a trolley is decelerated by a material "escape lane" similar to how racing cars are stopped off the racetrack. I have already looked at the relationship between the entry speed and the distance traveled, this was a...
  41. S

    Investigation on a Light Dependant Resistor

    Special lamps may be purchased to help plants grow indoors. These lamps produce light with wavelengths comparable to natural sunlight. A manufacturer wishes to check these lamps by measuring the out put of the lamp at different wavelengths. The above is the scenario given :smile: You are...
  42. J

    Investigation: Factors Affecting Friction

    Homework Statement Design and complete an investigation to determine how the following factors affect the force of friction: weight surface are speed Homework Equations The magnitude of the force that is provided by an elastic band is directly related to the distance the elastic...
  43. M

    Help Solve a Forensic Investigation of a Fire

    Hello, I am a Forensic Investigator, and I am seeking help solving a case involving a possible (and probable) extension cord failure. This failure caused a fire and very large lawsuite. I need help determining the heat release potential of this extension, given the load on the end of it...
  44. W

    Investigation of Suspicious Intruder at Ontario School

    Ontario, Canada. Today I was escorted to the office of my school by my VP where there was a detective and another VP (not trying to be dramatic). Now to give you the info, my school about a month or two ago had a lockdown due to a believed intruder. So they show me some footage from the...
  45. N

    Theoretical investigation into High Tc Superconductors

    This attachement was my dissertation, my final project for my BSc in physics, just would like a proffessional opinion. Best wishes newo
  46. P

    News Diebold, Sequoia, ES&S under investigation

    Good news. Article continues (and permission to reprint was granted at the link): http://www.bbvforums.org/cgi-bin/forums/board-auth.cgi?file=/1954/19776.html This is basically (part of) the next installment in the ongoing investigation into Diebold (etc) electronic vote machines. It...
  47. V

    What are some tips for improving a friction experiment?

    I started working on my project for real at school today and I have no idea if it really is a good project. It seems very arbitrary and messy somehow. I've got two experiments to explore friction. Ff = Frictional force. Fg = Component of force acting down parallel to incline Fn = Reaction...
  48. R

    Factors Affecting Resonant Frequency of String or Wire: Investigation Help

    Ive been given the task of investigating what factors will affect the resonant frequency of a piece of string or wire :cry: . I believe it may have something to do with standing or stationary ways. At the moment I believe I have two ways of doing this, one by using string, vibration generator...
  49. E

    News Not so independent investigation?

    Heard on the news that G.W.Bush was going to let a committee investigate why the help to New Orleans was so ineffective, and what could have been done better. This sounds like a perfectly good idea. However they also claimed that he would lead this committee by himself! :bugeye: Is this true?
  50. C

    Can Experimenting with Different Materials Help Understand Heat Retention?

    Hi I am a year 12 student from Australia and I have to design an experiment. I have no idea what to do. Design is not my forte. I was thinking perhaps I could test whether density effects a material's ability to retain heat by testing the temperature change of a mass of water in a paper cup...
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