Surface Tension My problem was to find out how to test or measure surface tension. I think the reason of some of the force in surface tension is cohesion and gravity. Surface Tension is the condition existing at the free surface of a liquid, resembling the properties of an elastic skin under tension. The tension is the result of intermolecular forces exerting an unbalanced inward pull on the individual surface molecules; this is reflected in the considerable curvature at those edges where the liquid
Root Surface Caries Caries can affect any surface of the teeth. The most commonly seen caries are found on the crown of a tooth, above the cemento-enamel junction, it is also possible for caries to form on the root surface, below the cemento-enamel junction. Dental root caries has received a great deal of attention in the past few decades. A variety of different patients are at risk for root surface caries. Dentists use several methods of treatment. Root surface caries are also called cemental caries
Beneath the Surface Review I think the key message that the play was trying to convey was that mistakes happen all the time. In this case, the purpose of the main character’s “dig” through Earth was to help him learn how to forgive himself and be able to move on with his life. The opening act of the play started with the main character, Andy, digging his way from Hawaii to Botswana. Over the course of his journey, the audience is introduced to an array of characters that are responsible in helping
Beyond the Surface of Shrek Fiona: You did it! You rescued me! You're amazing! You're… You're wonderful! You're...(Shrek and Donkey tumble down the slope with a loud crash.) Fiona: A little unorthodox I'll admit (Soft classical music plays in the background) but, thine deed is great and thine heart is pure. I'm eternally in your debt. (Donkey clears his throat loudly.) Fiona: And where would a brave knight be without his noble steed? Donkey: Oh, I hope you heard that. She called me
For many years, it was believed that the occurrence of surface runoff was primarily controlled by the infiltration characteristics of the ground; whenever the rainfall rate exceeds or surpasses the soil's infiltration capacity, runoff is generated. Horton (1933, 1940) was responsible for some of the early foundational work for this concept and hence the process is referred to as Hortonian runoff. Horton (1943) also recognized that surface runoff rarely occurs on soils well protected by forest cover
Investigating Surfaces for Insulating Boiling Water in a Flask Aim I'm investigating which surface (matt black or silvery) is best at insulating boiling water. I will investigate this by covering two equally sized conical flasks in different materials; one in matt black and one in silvery. After that I will fill each of the flasks with an equal amount of boiling water. At regular intervals of 1 minute I will measure the drop in water temperature in each flask. Prediction I predict
The Effect of Weight on Sliding Friction Between a Block and Surface Planning ======== In this investigation we are going to find out what effect weight has on sliding friction. Friction is the force that is between two objects that are in contact with each other. The force is always present even though people only think it is there when the object is moving. Leonardo da Vinci was one of the first people to experiment with the idea of friction. He came up with two types of friction;
Surface Area's Effect on the Way Enzymes Work Introduction I am doing an investigation to see how the amount of surface area affects how a enzyme, Catalase 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
Investigating the Speed at Which a Ball Bounces Off a Surface Plan Introduction I intend on investigating the speed at which a ball rebounds of a given surface. I will try and find a relationship between the speed it hits the surface and the speed it comes off the surface. Background Information ====================== The principle of conservation of energy states "Energy cannot be created or destroyed, only converted from one form to another."1 This is the reason that the
What sources are the biggest problem in surface water pollution? types of pollution: There are a number of major types of water pollution. The polluters are: - petroleum products - Pesticides and herbicides - Heavy metals - hazardous wastes - fertilizer - sediments - infectious organisms. Petroleum products which among other things are used for fuel, lubricant and plastics, can get into the water through the discharge of ships and tankers, and the leaking from pipelines and underground storage
An Experiment To Investigate The Relationship Between Surface Area and Rate Of Reaction Introduction The rate of reaction (reaction velocity) may be defined as the rate of change of concentration of a stated reactant or product. The rate of a reaction is found by measuring the amount of a reactant used up per unit of time or the amount of a product produced per unit of time. A reaction can be made to go faster or slower by changing a number of factors. In order for a reaction to occur certain things
Investigation to Determine the Relationship Between Surface Area and Rate of Oxygen Production To determine the relationship between surface area and rate of oxygen production when a potato is placed in hydrogen peroxide (H2O2) solution. Background Information ---------------------- Potato contains enzymes such as catalase. Catalase are protein molecules, which are found in animal and plant cells. Catalase speeds up specific reactions in the cells. They all have very specific duty
Demonstrating How Surface Area and Volume Affect Heat Loss in Animals Planning ======== Aim: To investigate how surface area and volume of an animal affects the amount of heat lost. Planning a simple procedure =========================== One standard test tube, one boiling test tube, and one centrifuge test tube will be filled with water at 40°C. A thermometer will be placed in each tube to measure the decrease in temperature of the water. This will be timed for 300 seconds
The Effect of Surface Area on the Rate of Reaction Between Catalase from a Potato and Hydrogen Peroxide Aim To find out the relationship between the surface area of a potato chip and the rate of reaction when hydrogen peroxide is put in with it. Variables As I do this experiment the thing I am going to be changing is the surface area of the potato chip, first I will put it in the beaker as a whole (3cm chip) then I will start cutting it into smaller pieces and repeating the experiment
surrounding air and surface, where as the silver cup will reflect the heat back into the cup therefore keeping the water hotter for longer. SCIENTIFIC KNOWLEDGE Basically it is due to three factors CONDUCTION, CONVECTION and RADIATION. 1. CONVECTION - the hot water in both cups will have convection current in them. The hot water will rise and sink as the water begins to cool. This means the heat energy is being passed on to the metal cup over most of its inner surface. 2. CONDUCTION
amount of water to test on. It will also have a roughly similar amount of particles. I will also put them in the same room together so the room temperature will be the same. The cans are made of the same material (aluminium) because I am testing surface area rather than different materials. I will use a water bath to heat the water so both cans will get the same temperature of water. This is how I will make it a fair test. Method The method I will be using is; I will boil 140ml of water
screen devices such as phones and tablets. Anyone who has held a mobile phone or handheld game knows that in a short period of time, the glass display becomes visibly dirty without anti-smudge coatings. Unwanted finger print smudges on touch screen surfaces significantly reduces the performance and utility of the device, as well as the quality of the image and the enjoyment of the user. Smudges are composites of materials resulting from contact with human skin and from being stored in pockets. The
one of the most destructive natural phenomena, consist of rapid vibrations of rock near the earth's surface. Because of their unpredictable occurrence and enormous capacity of destruction, they have brought fear to mankind since ancient times. A single shock usually lasts no more than a few seconds, but a series of smaller quakes may last for as long as five minutes. The quake felt on the surface is always the result, not the cause of some underground geologic process, and in many cases the damage
gravity on Mars is about one-third of that on Earth. Though it is much smaller, Mars does have the same surface land area as Earth. Other than Earth, Mars posses the most highly varied and interesting known terrain in our solar system. The surface of Mars is a very hostile place however it is more like Earth’s surface than any other planet in our solar system. Much of the Martian surface
alien world could exist above the surface. The nature of that world would be beyond their comprehension. You could sit only few inches from the fish, yet be separated from them by an immense chasm. You and the fish lives would be spent in two distinct universes, never entering each other’s world, yet were separated by only the thinnest barrier, the water’s surface. Now imagine that you are in a rainstorm next to the same pond. You notice that the pond’s surface was bombarded by thousands of tiny