Spinners Investigation
Aim: To investigate how changing a feature, like using length affects the speed of the spinner.
Plan: In this investigation in testing how fast a spinner's speed is I am going to make the variable the wing length. I made a prototype spinner to observe what different types of material made a better spinner; matters that will affect the spinner are the weight of the spinner, friction, up-thrust and the gravitational pull. The bigger the surface area of the spinner the more friction there will be.
Equipment: Paper,
Paperclips,
Stopwatch,
Ruler.
In the experiment I will change the wing length 10 times and cut 1 cm off each time. I will repeat this 5 times to be certain I have
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To make this a fair test I have to use the same type of paper to make my spinner, in this case I am using graph paper. I have to keep the same amount of paper clips attached to the spinner, I also have to keep the height that I drop the spinner from (2.5 metres), and I also want to use the same stopwatch so it gives off the right time and at the right speed because other stopwatches may vary.
I predict that the shorter the wing length gets the faster the spinner is going to fall and reach the ground. I think this because the shorter the wing length the less surface area there is on the spinner and less friction and up-thrust. I am going to use a results table to record my data.
The safety aspects of the investigation I have to consider are:
· Make sure no-one is stood around you,
· Make sure stool is safe to stand on,
· Careful using scissors.
“Decide what you want, decide what you are willing to exchange for it. Establish your priorities and get to work.” - H.L Hunt. Spindletop was the first big oil strike in 1901, it gave a new shape to the state’s future. In fact, during World War II,Texas produced twice as much oil than Nazi Germany and Japan did combined. Oil didn’t change Texas overnight. You trusted me to find out What story should be told? After reading the documents that you gave me I decided I would do school funds,minorities in West Texas , and divorce rates.
1. In each case, is the ink a pure substance (based on your results)? Why or why not?
The cutouts were then placed into large test tubes containing 4ml of isopropyl alcohol for each pigment band, total pigment sample 1, and total pigment sample 2. They were then sealed, until the pigments from the paper transferred onto the isopropyl alcohol. The same amounts of smaller test tubes were obtained, plus an additional small test tube, which was filled with isopropyl alcohol and acted as a blank. The eluted pigment solution lacking the paper was transferred into the rest of their respective smaller test tubes.
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
Throughout the past century, investigations of quantum and particle physics phenomena have proven to show the most significant concepts and ideas in the physical and sub-atomic world. However, the discoveries yet to be made are endless. One of the most fascinating concepts in the sub-atomic universe is the idea of spintronics. Spintronics is the quantum study of the independent angular momentum (not to be confused with the orbital angular momentum of the electron) of a particle, typically that of an electron (Introduction). An electron is a fundamental particle, with a negative charge, and is independently studied in the process of spintronic devices. The spin angular momentum of electrons is ±½ћ. Devices that use the properties
A person doing this lab experiment will need a planarian, a metric ruler, a small jar with a lid, enough distilled water to fill the jar about half to three quarters of the way, a transfer pipette, a petri dish, a location in either light or dark to keep it depending on what results the person might be looking for, a way to keep up with and record the measurements found, and a dissection microscope if possible. According to the handout of instructions given, the overall main goal of this experiment was to see if the planarian would or would not regenerate the head or tail at the same rate regardless of where the initial cut was made, and whether or not it was in the light or dark (Planarian Project: Procedure).
In this short story “The Last Spin” by Evan Hunter ,the very opening sentence is showing the unusual relationship of Tigo and Danny .And the writer personifications 'the jacket 'who is telling the Danny that Tigo is his enemy. Tigo was wearing green silk jacket with orange stripe on each sleeves and danny was wearing blue and gold jacket, is representing that he belongs to a gangs. As the gang guys knowns ,as of their symbol or their appearances.
As I do this experiment the thing I am going to be changing is the
Put a label on each test tube. With a pencil, number each test tube from one to twelve.
1. I will first take my resting pulse rate by placing the tips of my
The basic process of making paper has not changed in more than 2000 years. It involves two stages: the breaking up of raw materials in water to make a suspension of individual fibbers and the formation of felted sheets by spreading this suspension on a porous surface, to drain excess water. The essential steps of papermaking by machine are identical with those of hand papermaking just much more complex. The first step in machine papermaking is the preparation of the raw material. For centuries, the main raw materials used in papermaking were cotton and linen fibbers obtained from rags. Today more than 95 percent of paper is made from wood cellulose. Wood is used mainly for the cheapest grades of paper, such as newsprint. Cotton and linen fibbers are still used for high quality writing and artist’s papers. Many kinds of wood can be used such as aspen, beach, birch fir, gum, hemlock, oak, pine, and spruce.
Planning and Method. Any experiment needs variations as well as fairness to be a true success. The two variations I will include in this experiment shall be: 1) The number of paperclips on the bottom of the helicopter. 2)
Spintronics is based on manipulating the flow of spin polarized current in metals and semiconductors. Introducing spin degrees of freedom and charge into the present semiconductor electronics at nanoscale level is a very important issue for realizing novel devices. Research is being carried out for the development of magnetic random access memories and nonvolatile logic applications by extensively studying novel spin based semiconductor device structures and magnetic material semiconductor hybrid structures. We can create spin polarization using many methods, that will lead to hole induced ferromagnetism in the case of InAs and GaAs alloyed with Mn [1]. This made it possible to integrate ferromagnetism with existing nonmagnetic Ill-V heterostructures. Carrier concentration has been modulated using insulating gate field-effect transistor structure and we were able to realize reversible electrical switching of the ferromagnetic phase transition and coercive force [1]. Ferromagnetic semiconductors may prove to be useful in developing spintronic devices that combine magnetization switching with other spin-related effects, once the transition temperature of these materials reaches well beyond room temperature. An overview of semiconductor spintronics has been presented here: