An Investigation into the elastic properties of different thickness of elastic bands Essays

An Investigation into the elastic properties of different thickness of elastic bands Essays An Investigation into the elastic properties of different thickness of elastic bands Essay An Investigation into the elastic properties of different thickness of elastic bands Essay Aim: the aim of this experiment is to find out what effect that different thickness of elastic bands has to the amount they stretch under a series of different weights. To test this I shall use different thickness of elastic band that are all the same length.. The final adjustment I shall make is to measure the thickest band with greater weights as well. This will show the effect of weight and its relation to the amount the band stretches. Hypothesis: According to hooks law the expansion of a spring is proportional to the weight it supports. If the same applies to the rubber band it to should increase in the amount it has expanded when a greater weight is applied. I therefore am able to predict that although not all the time the band will expand at the same rate as the amount of weight applied. However elastic bands are not quite as elastic as springs and so I do not expect this to be completely true. I also expect that the thicker the band the greater the weight will be required to stretch the band at the same rate. This entire put together should mean that as the pull on the bands is increased so the amount they stretch is. This should also mean that the amount they increase by should be smaller the thicker the band is. (E.g. the thinnest band might increase by 3cm for each extra Newton, the second thickest might increase by 2 cm and the thickest might increase by just 1cm. this would be up to a point where the bands would incre ase quicker. This point would be a greater force for each of the thicker bands with the thickest band needing the greatest pull before this occurred.) Diagram: Variables: The 2 things I am going to change (on purpose) is the thickness of the band and the amount of force pulling on the band. I will only change one variable at a time. The fact that I shall have to do it over two days could affect the temperature of the band and this could have a direct effect on the results of the elastitisity band. I shall however use the same equipment for the experiment. The person who looks at the elastic band shall be the same all the time. Measurements: I am going to measure the length of the band between 0.1cm and 30 cm. This shall be accurate to 0.1 of a cm. The weight being used on the band shall be measured between 10grms and 500grms. Plan/Method: First of all I shall start of with the thinnest band and with the 10grm weight. After I take down the result I shall increase the weight by 10grms and take the result again. I9 shall repeat this until I get up to 150grm where I shall increase the weight by 50 grams and take the result. Once I get up to 500grms I shall stop. Once I have done all the results for that band I shall repeat the experiment again but with the thicker band. Once that thickness of band has been done I shall do the experiment again but with the thickest band. Apparatus: I am going to need a 30cm ruler, a clamp stand, 3 different thickness of elastic bands, some tape and some weights. These weights will have to be able to get up to 150grms increasing in 10grms and 500grms increasing in 50grms so the best would be 15 10grm weights and 7 50grm weights. Risk assessment: The only problem could be if someone was messing about and he fired a band into someone elses eye. So to avoid this we shall all not mess about. Analysing evidence and drawing conclusions Analysis: All the bands start of looking the same with a pattern like Band 3 however bands 2 and 1 go off from this pattern. For band 1 this happens after it reaches 100grms and beyond 10cm in length. This is where it goes up dramatically. For band 2 this occurs around 150 or 10cm again. It is roughly the same in both cases. After this point the bands length rises dramatically. Conclusion: When a load gets too much for an object. The object no longer goes back too its original size and it now gets stretched to a different degree to that which it did previously. This is because there are small elastic atoms which hold the band together when a load gets too much these come out of place. So it gets stretched and cant come back together to its original shape as the atoms which hold the band together this means it does not have all the atoms in there right place and is stretched. This is shown in band 12 and Band 2 where the band suddenly stretches a lot greater then previously. These results compliment my hypothesis very well. Evaluating Evidence The Evidence: I had plenty of evidence as a clear pattern can be seen in each of the band graphs. These patterns also make a lot of sense. The evidence was very accurate however it was not as accurate as it could have been. A few pieces of evidence can be seen to make not as much sense in the whole feel of the graph. However these differences are not massive. The evidence is still good enough to support my theory. As there is enough of it and it is quite accurate. Improvements: I could have improved my experiment by using a ruler to check out the length to be sure. This would have made my results more accurate but probably would have made the pattern the same. I could have extended my experiment by including more results between 150 to 500.

Money-Saving Tips for Budget Grocery Shopping

Money-Saving Tips for Budget Grocery Shopping Money-Saving Advice: Start Budget Grocery Shopping Have you calculated how much money on average you spend on groceries? Actually, shopping groceries can turn out to be a significant expense, especially for families. However, there are some budgeting tips on how to save more money and make shopping more affordable. So, here are tips how to save money on groceries: Never go shopping when you are hungry. When people are hungry, they tend to put in their shopping basket everything they see on their way (even if they do not have a habit to eat such food). Therefore, to avoid buying some extra or unnecessary staff, go shopping on a full stomach. Prepare the shopping list in advance. Before going to the supermarket, sit for a while and think what you need. Go to the kitchen and check all the drawers and cupboards to see what products you have run out of. This strategy will prove both time- and money-saving. Get the habit of planning an approximate menu for a week before going shopping. Buy only food that you are sure you will eat. Try going shopping once a week. Of course, you might sometimes go to the shop during the day to buy something like milk or bread, but make sure that big shopping day is only once a week. Its easier to make right choices when you are energetic, so never go shopping when you feel tired and the only thing you want is to lie in bed. Make sure that you do not throw out all the leftovers away. Sometimes you might cook something for a dinner but then freeze it or store in a fridge for the next day (or take as a lunch for work). Buy food containers to package your snacks. Always sort food into containers so that you know what is where in the fridge. Grow a habit of making your home-made snacks. Do not buy some canned stuff or fast-food. Make sure you clean your fridge, freezer, drawers, and cupboards regularly once a month. You need to free some space before buying more food. Make sure you organize the food you buy into corresponding shelves, drawers, or cupboards. When you know where the food is, you will be aware what food you have and where to find it. Try to prepare snacks at home well in advance before your working day. For example, cut some fruit, vegetables, or cheese in the evening to prepare them for tomorrow. I bet you will want to sleep five minutes more and will end up spending money on fast food at work. Shop with a certain budget and try not to pay with your credit card. Always try some new foods to compare with the usual ones and prefer more quality food. Calculate the total sum of the products you buy as you put them in the shopping cart. Buy non-grocery items in some discount stores (because such stuff as garbage bags is usually more expensive in the supermarkets). Hopefully, these tips will be of great help to you and the next time you go shopping you will be able to save more money.