Practice A2 Investigation: Measuring the torsion of wire

Practice A2 Investigation: Measuring the torsion of wire Introduction I decided to investigate how the torsion of wire varies with its length and thickness as it is an interesting, challenging topic which has clearly defined variables. Whilst it is fairly obvious that the torsion of wire would increase as the specimen was made shorter and thicker, the purpose of this investigation was to accurately examine the relationship between the torsion constant of wire, and the variables of length and thickness, using the values of correlation to accurately analyse the effect of these factors and endeavour to explain these conclusions with sound physics knowledge. Plan Method The torsion of wire can be measured in a variety of methods, all of which have their merits and drawbacks. The method I chose to employ for this particular investigation was the Torsion Pendulum technique, as all of the necessary materials were available to me in my school laboratory. One of the alternatives to this method was measuring the vertical displacement of a mass hanging from a spring- this method was inappropriate for my investigation as it is far more complex to measure the variables of thickness and length for a spring than for a single uniform piece of wire. Furthermore, I did not have access to a wide array of springs of differing length and thickness with equal mass. The method for a Torsion

  • Word count: 2731
  • Level: AS and A Level
  • Subject: Science
Access this essay

How does the number of coils on an electromagnet affect its strength?

How Does The Number of Coils On An Electromagnet Affect Its Strength? Aim: To find out how the number of coils on an electromagnet affects its strength. Scientific Knowledge: An electromagnet is a temporary magnet; the magnetic field only exists when an electric current is flowing. Any electric current produces a magnetic field, but the field near an ordinary straight conductor is rarely strong enough to be of practical use. A strong field can be produced if a wire is wrapped around a soft iron core and a current is passed through the wire. The strength of the electromagnet depends on how many coils you wrap round and how high the voltage is. The area of force (magnetic field) surrounding a bar magnet can be shown by the lines of force as shown below, although these lines are no more real than the lines of latitude and longitude on a map or globe. When opposite poles of a magnet are brought together, the lines of force join up and the magnets pull together. When like poles of a magnet are brought together, the lines of force push away from each other and the magnets repel each other. Electromagnets are used to lift large masses of magnetic material such as scrap iron. Electromagnets are also found in electrical generators, electric motors, doorbells, circuit breakers, television receivers, loudspeakers, etc. The factors that increase the strength of an

  • Word count: 2040
  • Level: AS and A Level
  • Subject: Science
Access this essay

The Physics of Curling

Adi Levy Professor Loveridge Physics 12 04 December 2012 The Physics of Curling One of the more popular sports that have achieved the title of “chess on ice” (as it is, of course, played on ice similar to hockey) is none other than the sport of curling. There is often fierce competition for this intriguing sport, as it is notoriously played on the Olympics, and it involves two teams with four people on each respective team .Each team is afforded eight stones in which the imperative and goal is for each player (the players take turns) to guide the stones from a fixed distance and as proximal as possible to a center target. Furthermore, there are two sweepers that attempt to guide the stone as close as possible to the center target(similar to a target one would see at an archery range except this target is embedded into the ice) --- the game requires an immense amount of strategy and hitting the stone (which is essentially the puck) at tactical angles while taking into consideration physical forces which is where the beauty of physics comes into this sport as it does with essentially almost every aspect of nature. Prominent physicist, Mark Shegelski, has actually spent a substantial amount of time, who also devotes a lot of his time researching quantum tunneling and decay, studies how physics applies to the sport of curling. Podcast host, Steve Mirsky, has a

  • Word count: 714
  • Level: AS and A Level
  • Subject: Science
Access this essay

Stopping distance Investigation.

PLAN: The aim of this experiment is to investigate the factors that affect the stopping distance of a vehicle. In order to do this, I must take into account the forces that act upon a vehicle when it attempts to brake. The results which I gain from doing this experiment should be representative of what the results would be like if I were to investigate this using a real car. Obviously this is not an option, and so I will have to stimulate these conditions as best I can whilst using the trolley instead. METHOD: To conduct this investigation, I will use a trolley, and change the mass of it by 1kg each time. The ramp that the trolley runs down will be supported by a tub, which will allow the height and angle of the ramp to remain constant. I will let the trolley go, and run freely down the ramp until it hits the break and comes to a halt. I will then record the stopping distance - the distance from the position of the break to where the vehicle has stopped. As the trolley goes down the ramp, it will pass through the light gate, registering a time as it does. Be recording this time, I will be able to draw graphs, and I will also be able to find out if the mass of the vehicle affects the speed at which the trolley goes down the ramp. In order for the trolley to break the light beam, a piece of paper will have to be positioned on top of it. I will also conduct another

  • Word count: 2077
  • Level: AS and A Level
  • Subject: Science
Access this essay

Electromagnet investigation

Tom Cole 11DSB-11R3 9061 25/6/02 Electromagnet investigation An electromagnet works similarly to a normal magnet but with one huge advantage. A normal magnet is constantly on but an electromagnet can be turned on and off. This is useful in both the science lab and industry such as a scrap yard. An industrial investigation of this size is obviously not possible in the science lab so in order to simulate a smaller type of situation I'm going to use small weights. I plan to find out the different characteristics of an electromagnet by changing the number of coils around the electromagnet and the amount of current which is passed through it. My hypothesis is that the amount of current and or coils which are placed on the magnet will govern the strength of the magnet. In order for the test to be fair I am going to have to make sure that some aspects stay the same and some are changed. I plan to change the CURRENT (AMPS) and the amount of coils wrapped around the core of the magnet. The factors which will remain the same are the voltage which I will set at 12V and the size of the iron core of the magnet. The investigation will require me to increase the amount of coils surrounding the iron bar. 100 coils will be the number I will use but this will change throughout the experiment. I also plan to see how much weight the electromagnet will hold. The weights which I

  • Word count: 596
  • Level: AS and A Level
  • Subject: Science
Access this essay

Electromagnetic Radiation.

Electromagnetic Radiation. The electromagnetic spectrum is the continuum of all electromagnetic waves arranged according to their frequency and wavelength. The spectrum is divided into regions based on their wavelength and proportionate energy. At the bottom of the spectrum are Gamma rays, which have the shortest wavelengths (less than 1x10^-12 m), and radio waves at the apex of the spectrum with extraordinarily long wavelengths that exceed a kilometre in length. While nearly all electromagnetic waves are invisible, there is a visible section that makes up, what normal people know as the colour spectrum. The sun, earth and other astrophysical bodies radiate electromagnetic energy in the form of a wave. These waves are given the name 'electromagnetic' because they are transmitted as a combination of varying electric and magnetic fields. These sinusoidal waves travel at right angles to each other and all at the same speed of 3x10^8 m/s in a vacuum. (electromagnetic wave) The fundamental behaviors of all the components of the electromagnetic spectrum are the same. The most obvious scientific difference is their varying wavelengths and frequencies and in the devices used to generate and detect them. All electromagnetic waves exhibit diffraction and interference as well as reflection and refraction. They also all obey the following equation: V

  • Word count: 2056
  • Level: AS and A Level
  • Subject: Science
Access this essay

Investigating the Mechanics of the 100 Metre Sprint.

Investigating the Mechanics of the 100 Metre Sprint In this assignment, I will be investigating the way in which an athlete run a race of 100 metre and also I will look at other different possibilities such as when an athlete accelerate or decelerate during the race. abidzaman, please do not redistribute this dissertation. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this dissertation elsewhere on the internet. Anybody found doing so will be permanently banned. The course is a track of 100 metres in length and I decided that I would not take into account the wind variation in this model because of lack of information. So therefore I assume that there is light wind that will not affect the time.cofd fdr sefdfdw orfd fdk infd fofd fd. Before my research I always thought that sprinters run as fast as they can for the whole distance of the race. But in my researches using the Internet and books, I found out that sprinting is a skilful activity just like football kicking and tennis. Such activity must be practised constantly to retain or improve an athlete's level of ability. Weber refuted abidzaman's structuralism hypothesis. Currently the world record time of the 100-meter race is 9.79 seconds produced by Maurice Greene. I was able to work out his average speed in the following way:

  • Word count: 2543
  • Level: AS and A Level
  • Subject: Science
Access this essay

Investigating the factors affecting the strength of an electromagnet.

* Investigating the factors affecting the strength of an electromagnet * Background Knowledge: The theory of magnetism is the only way to explain the process of magnetising an object. In an unmagnetised piece of iron the domains are pointing in numerous directions, which results in them cancelling each other out. However, a magnetised piece of iron would have all the magnetic domains pointing in all the same direction. This is due to the north poles being at one end and the south poles at the other end. The domains are actually extremely small atomic magnets that line up with each other to form groups, called domains. All iron and steel are made up out of millions of these domains. The magnetic field is the area around a magnet where it has a magnetic effect. The shape of a magnetic field can be determined by placing a thin layer of iron filings over paper with a bar magnet underneath. When the paper is gently tapped the iron filings act like tiny compasses and point themselves along the lines of flux. The magnetic field of an electromagnet is the same as a bar magnet and it looks like this: Electricity has a magnetic effect; a wire carrying a current has a magnetic field round it. The magnetic field around a wire is in the shape of circles. The magnetic effect can be strengthened by: -Using a larger current -Using more turns of wire on the core -Using a soft iron

  • Word count: 1421
  • Level: AS and A Level
  • Subject: Science
Access this essay

To Find the Quality of Players Playing Rugby for Malvern College 1st XV.

Maths Statistics Investigation Maths Statistics Investigation To Find the Quality of Players Playing Rugby for Malvern College 1st XV Aim I will attempt during the course of this investigation to rate all of the players who played for Malvern 1st XV in the first 6 matches of the 2000 season. In order to do this I must collect the data, analyse each piece of data collected, and then devise some sort of system using a formula that will rate an individual player over the course of the season. This formula must not only calculate the player's point score for each match according to a points system which I shall devise, but also average the points score over the season taking into account time missed through injury. I will also calculate the average standard of player using the mean, and also find the standard deviation to show the average deviation from the mean. Plan In order to devise my scoring system I must first decide on the categories that I shall use for my scoring system. I have decided that there will be two criteria for assessment of a player. These criteria will be: *Time spent on the pitch + time out due to injury, divided by number of matches played to find the average time spent on the pitch. *Coach's assessment percentage score for each match, taking into account position and what is required. I will add up the score for each match and divide by the number

  • Word count: 1943
  • Level: AS and A Level
  • Subject: Science
Access this essay