Hipparcos Mira Variable Stars ABSTRACT From the visual and infrared light curves we are trying to find the phase changes and correlate them to Infrared shift and magutdes to see what is happing to Mira type stars as they age. Most of the radiation in the star is in the Infrared. The method being used O-C and fitting mean light curves. All mira variables pulsate undergoing rapid mass loss. In the conclusion we show that the magnitude has a positive correlation with the phase shift. I.Introduction
one of the stars wink at you. That would be Algol, the Demon Star. Every two days, 20 hours and 49 minutes, Algol fades to one-third of its usual brightness - for two hours - and then quickly returns to its original luster. It's as if Algol is winking. Algol takes less than ten hours to go from its normal brightness down to its minimum light and then back to normal, so the star's whole performance can be watched in a single night. It is a perfect example of an "eclipsing binary" star, which brightens
STARS The magnitude scale was invented by an ancient Greek astronomer named Hipparchus in about 150 BC He ranked the stars he could see in terms of their brightness, with 1 representing the brightest down to 6 representing the faintest. Modern astronomy has extended this system to stars brighter than Hipparchus' 1st magnitude stars and ones much, much fainter than 6. As it turns out, the eye senses brightness logarithmically, so each increase in 5 magnitudes corresponds to a decrease in brightness
Clarke, Mccaughrean, 2005]. A nebula is a cloud of gas and dust [Oxford Dictionary, 2016] where either new stars are born or dead stars remain. The Orion Nebula is both an emission and reflection nebula, known as a diffuse nebula. An emission nebula is one in where there is a cloud of high temperature gas [Arnett, 1997]. A reflection nebula is one where the cloud of gas is illuminated by stars around it. The nebula has a
· Variable Resistor. · Ammeter. · Voltmeter. · 6V Filament Lamp. · 7 Wires. Definitions: Ammeter - This is a device that measures the current of electrons in Amps. It has to be placed in Series on the circuit. Voltmeter - This is a device for measuring the potential difference of the electrons in the circuit. They are measured in Volts. It is placed in Parallel. Variable Resistor - This acts in the same way
exercise are on the heart rate. And to record these results in various formats. VARIABLES: - * Type of exercise * Duration of exercise * Intensity of exercise * Stage of respiration * Age of the person exercising * level of fitness and recovery rate * gender of candidate * temperature * amount of recovery time KEY VARIABLE: - The variable that I will be using is the duration of exercise, this is because it is easy to measure
Circuit Task: To investigate how length and width of copper wire affect on the current of a circuit. Prediction: In this experiment, the input variable will be changing the length of the copper wire used in the experiment, and also the SWG of the wire, which means the width of the wire. By changing this variable, the current the circuit will vary. With my knowledge in science and some research on the factors that affect a circuit's resistance. I am able to
Internal Resistance Investigation I will conduct the following investigation with the aim to find the internal resistance of a lemon battery, which I will construct myself. The variables that could affect my experiment are as follows: · Size of lemon - I will conduct my experiment in no longer than an hour, allowing me to use the same lemon for all results · Size of metal electrodes - I will use the exact same electrodes throughout the whole experiment ·
gnoseological sense the fundamental feature of the absolute is unambiguity. The absolute is unambiguous, it has always and everywhere only one meaning. Relative is, on the contrary, conditional, it exists only in reference to other beings; it is variable, unstable, it changes in various relations. That is the ontological status of the relative, which in gnoseological language means ambiguity, it has multimeaning. Relative is ambiguous. One of the most difficult problems of philosophy is the investigation
counterparts. Does the smoker miss more work than the non-smoker? Data from these random samples were used to draw a conclusion…. SMOKERSDATA **VERSUS**DEFINITION NON-SMOKERSTABLE Unit of Observation: Smoking and Non-Smoking Employees Variable Name: Definition: Unit of Measurement: Data Source: Smoker Employee Days Absent in Past Year http://lad.org/issues/4/horizon.html; Smokes July 11, 2000 Non-Smoker Employee Does Days
the speed of the rate of reaction when reacting with Magnesium Ribbon. I want to find out whether the strength of Hydrochloric acid will affect the speed of the rate of reaction when reacting with Magnesium Ribbon. Variables There are two important independent variables in my investigation the first of which is the concentration of the Hydrochloric Acid used during the investigation. The concentration of the acid will partly determine how fast the reaction takes place, if we put some
as a higher temperature would mean diffusion would occur quicker. The mass and surface area of the potatoes at the beginning of the experiment are other controls I will need to monitor to ensure a fair test. The mass of the potato is a dependent variable; this means that it will be measured throughout the experiment. I will measure the mass in grams correct to 2d.p. The potato chip will be measured before it is put in the solution, and after. This will allow us to see whether osmosis has taken place
increase. I predict that the weight of the potato in the sugar solution will decrease when it reaches 3:1 (salt: water). In put Variables: -Molarity -Size of potato -Mass of Water -Molarity of Sugar -Length of time in the solution -Temperature of water Out put variables: -Weight of potato Key variables: -Molarity of sugar. This is a key variable because it has the most effective outcome because osmosis only works when there are different molarities in and outside of the potato
Vocabulary Assignment #1 Nonexperimental Research (McMillan, 2012, p.13): Nonexperimental research is a quantitative research design in which the researcher has no control over any of the variables or factors within a study, and thus cannot influence the behavior of the subjects of the study. This phrase relates to a study that I may conduct because I would like to investigate how student-athletes’ academic achievement compares to that of non-student-athletes. In such an investigation, I would
blood is needed to run in the circulatory system, therefore the heart rate will go up. Variables: The results can be affected by the following things, the change of amount of exercises, the change of time for exercising and resting, the change of temperature and the change of person and their health. Input variables: The input variable will be the time of exercises. Output variables: The output variable will be the results of heart rate. Fair test: To make this experiment a fair test
so if you put more lamps into the circuit there is more resistance. As the resistance of the variable resistor decreases the current in the circuit increases until the bulbs burn out. If the number of bulbs in a series circuit is increased, less current will flow. The lamps resist the current, so if you put more lamps into the circuit there is more resistance. As the resistance of the variable resistor decreases the current in the circuit increases until the bulb burns out. The filament
Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration. The aim of the investigation is to find the variables that affect the rate of osmosis and how they affect the rate of reaction. The variables that affect the rate of reaction of osmosis are, · The surface area of the object, · The concentration of the solution, · Temperature of the experiment Surface area If the surface area
works. Catalase is a biological catalyst which means that is speeds up a reaction itself. I am going to see how much foam is created after 5 minutes, this should show us whether the amount of surface gives a better or worse reaction. My input variable will be the surface area. The potato which contains the Catalase will be cut into piece this size: 1cm x 1cm x 2cm. Test tube A will have a piece of potato which is this size. Test tube B will have this size potato in but cut in half and
[IMAGE] Seconds ------- There are five factors, which affect the rate of a reaction, they are: 1. Temperature 2. Concentration 3. Pressure 4. Surface Area 5. Catalyst Therefore the independent variable will be the temperature, the dependant variable will be the time, and the control will be me. I Have decided to investigate what effect temperature has on the rate of reaction, because it is the most practical to do, and it doesn't take a lot of time. Whenever I am
such as potato and liver. It's used for removing Hydrogen Peroxide from cells. Hydrogen Peroxide is the poisonous product of metabolism. Catalase speeds up the decomposition of Hydrogen Peroxide into oxygen and water. Variables I will make sure I keep the following variables the same. Size of potato: The Size of a potato cube would effect the investigation because the size of the cube would effect the number of cells in contact with the hydrogen peroxide. Temperature: Temperature can