• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Crunchie as bone replacement

Extracts from this document...


Is Crunchie a suitable bone structure? Many people will need bones replaced during their lifetime, most of the spare parts are made from polymers and now artificial bone has been developed and is being used. As you can see below both, the Crunchie and the human bone have a similar honeycomb like structure. I am going to test the breaking stress that a Crunchie chocolate bar has. We are going to use this data and compare it to the breaking stress that an ankle bone has to see if it is a suitable replacement. Materials such as Titanium and coral are used, they are chosen because of their tensile strength and how well blood vessels can be threaded through. These two properties may be found in a Crunchie chocolate bar as the honeycomb structure is likely to give room for the blood vessels but also give strength. Equipment Crunchie chocolate bars - I have decided to leave the outer layer of chocolate on the Crunchie bar as this will give a similar affect as the hard outer layer on the bone, and will give me an answer which will be more accurate. Vice - This will be used to hold the Crunchie bar and scales in place, it will also be tightened at an even rate to see what the breaking stress of the crunchie is. Scales - I will use this to work out how much mass the Crunchie bar can take, that number will then be converted to Newtons (N) ...read more.


I will also make sure that when I take the reading off the scales I will stand directly in front of the scales so I can get the most accurate reading possible. Another way to keep my results as accurate as possible is to tighten each screw equally when increasing the pressure on the Crunchie to make sure that the force is equally spread all over the Crunchie. Crunchie Mass in Kg Converted to N 1 30.0 294.3 2 28.0 274.7 3 22.0 215.9 4 27.0 264.9 5 32.0 313.9 6 23.0 225.6 7 30.0 294.3 8 27.0 264.9 Average 27.4 268.6 Breaking Stress in the bone Speed I am calculating the speed you would hit the floor from 10m. v2 = u2 + 2as v2 = 2.000 x 9.810 x 10.00 v2 = 196.2 v = V196.2 v = 14.00ms-2 Deceleration ?v (Change in velocity) ?t (Change in time) 14.00 0.100 = 140.0ms-2 Force on legs f = ma f = 70.00 x 140.0 f = 9.800x103N Cross sectional area of bone ? x 0.0722 = 8.143x10-3m 2.000 Breaking stress of bone ? = f a ? =9.800x103N 8.143x10-3m ? = 1.203x106 Pa Pascal (Pa) is the S.I unit for the measurement of stress. Breaking stress of a Crunchie Using my results I obtained I can work out the breaking stress and then compare it to that of a bone. ...read more.


This is where the pressure being put on the Crunchie causes a melting affect. To improve the experiment I would use a more accurate set of scales, maybe digital ones. I would also set up at video recorder to record the scales so I can play it back in slow motion to get the most accurate reading off of them when the Crunchie breaks. I could also use a set of scales which records the maximum pressure exerted on the Crunchie at the point where it breaks. I would also try and use a vice which is tightened up by just the one screw so I can keep pressure as even as possible, therefore giving me more accurate results. Percentage Error Scales: I think that when I recorded the number off of the scales I could have been out by 1Kg either way as I was only using my eyes to watch the scales. I will work it out using 27.4Kg as this is the average out of my results. 1.00 27.4 x 100 = 3.65% Micrometer: This is very accurate as it measure to the nearest 100th of a mm. As I only measured two lengths with the micrometer I will work out the percentage error for both lengths. 1.00x10-5 1.71x10-2 x 100 = 5.85x10-2% 1.00x10-5 2.70x10-2 x 100 = 3.70x10-2% As you can see both lengths came out with very low percentage errors, which proves that this measuring was very accurate. ?? ?? ?? ?? By Mark Everitt Page 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Music section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Music essays

  1. Critical evaluation - In the Snack Bar Edwin Morgan.

    "And slowly we go up. And slowly we go up." Not only does the repetition create an easily pictured image, it also creates a steady rhythm that puts even more emphasis on the slow motion of climbing the stairs. Hyphens are also used to build rhythm when the old man says: "Give me - your arm - it's better."

  2. An Evaluation of the Marketing Strategy of Nestl Yorkie Chocolate Bars.

    and found out the price of Original Yorkie. I would expect all these prices to be reasonably similar because all the shops are quite close to each other and should be competitive prices. It will also be interesting to see how close the prices are to the RRP.

  1. My Business Studies Coursework is to design my very own chocolate bar. This involves ...

    Why is it useful to have one? A logo is a symbol used by a business so that they can be easily identified to the general public. It is an important part of marketing. The company wants the public to recognise the logo when they see it and instantly think of the product(s).

  2. The impact of California Smoking Bar Banned to the bar owners in Orange County.

    Given the significantly increased risk of heart disease and lung cancer, one would expect to find increased rates of involuntary smoking-related disease and death in bar and restaurant employees. There are several confounding variables that could explain an elevated lung cancer risk in bar workers.

  1. Dj equipment

    OVERALL Sorato seems to have good points and bad points of both CD/MP3 mixing and Vinyl mixing but would be an alternative to buying expensive CDJ's yet still being able to make use of more readily available digitized versions of tracks.

  2. Free essay

    Price List and Evaluation of Equipment

    Allen and Heath Xone 62 4/5 �698 (htfr) 12 month warranty The most expensive mixer I have reviewed. .4 channel + 2 microphone channels. This fills the requirement for number of channels up to 4 potential audio sources and 2 mics .3 band EQ with kill switch This has the 3 band EQ needed to effectively level mixes enough to sit on top of each other.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work