McKenzie Bumgarner
Mrs. McGillivary
8th Science
18 December 2013
Today floating is important. Boats float in the ocean, boats can be used for fun and also for delivering things over sea. There are many factors that contribute to floating. Such as density, buoyancy, solution, solvent, solute and many other things.
Density is “Is a measure of mass per unit of volume. Density is what helps make things float, anything that has a density less than one it floats. The more density the object has, the higher the mass per volume. For example, take a sponge, most of the artificial ones are made out of foamed plastic. Therefore sponges hold or contain a lot of density. If you were to take a sponge and melt it into a plastic soup without the bubbles, it will stay one pound but it will become much denser. Density is probably the most important thing thats needed in order for an object float.1,000.00 kg/m³ is the equation for the density of water.(chemforkids.com)
Buoyancy is the ability to float. “Buoyancy is first and foremost, a force.” buoyancy moves things in an upward movement....
Sink or Float Introduction: I am doing this experiment to find the density of aluminum foil to see if it floats or sinks when placed in water. I hope to find out how the density of aluminum foil changes when weight is added to the foil. I hypothesize that the boat will hold 20 pennies before sinking. You will need to get: Aluminum foil Pennies Water And a big container or tub for your boat to float in. Procedure: 1.
Ballast (10) - heavy material that is placed low in vessels to improve stability. Ex: iron, gravel, and lead
Archimedes principle says that the magnitude of the buoyant force always equals the weight of the fluid displaced by the object. This buoyant force always acts upward through the point that was the center of gravity of the displaced fluid. In the case of floating objects the buoyant force is equal to the force of gravity on the object. Knowing that the change in pressure is equal to the Buoyant force per unit area (ΔP = B/A) we see that B = (ΔP)A and ΔP = ρgH where ρ is the density of the fluid g is the acceleration due to gravity and H is the height of the fluid displaced.
How much is your boat able to hold? A boat can only hold so much weight before it starts to sink. Too much weight on a boat can cause the boat to sway back and forth or roll over. It is very important to make sure that the load of your cargo is balanced or the chance of capsizing a boat is greatly increased.
All through our academic years we were taught how to write. Starting with elementary, when the form of writing was first introduced, it consisted of compositions with simple prompts about our weekends. Now, that there was an idea of how to write, middle school English teachers began teaching students a writing format. This format is commonly known as the five-paragraph essay, which entailed an introduction, three supporting body paragraphs, and a conclusion. The five-paragraph essay began being strongly implemented in high school and it leads to many debates whether or not it benefited students proceeding into college. I believe the five-paragraph format was helpful for high school students starting out, but is not as beneficial to freshman
The boat floats on the water according to Archimedes Principle which states an immersed object is buoyed up by a force equal to the weight of the fluid it displaces. The force applied downwards by earth’s gravity coupled with the upward force of buoyancy allows the boat to float. The boat consists of separate components each having their own center of mass, or center of gravity. The boat, the occupant(s), the engine or oars, and the fishing gear all combine to create a whole unit. The center of mass for the whole system is the average of the center of mass of each component. These components may move relative to each other but as a whole cannot change its velocity or momentum without the application of an external force. Newton’s first law of motion states that an object at rest stays at rest unless a force is exerted upon it. For the boat to move through the water a force must be exerted upon it. The forces that move the boat can be the current of the water, the rowing of the oars, the engines propeller, and wind. As the boat moves through the water a Doppler Effect is created. The Doppler Effect applies to all
Surface Tension: The contractive tendency of a liquid that allows it to resist an external force. This is measured in Newton.
Each person carries things with them, whether it’s a purse, or a backpack, or a slim wallet slid into their pocket. They may not carry these physical things all of the time, but these staple items are with more than they’re not. The become a part of the person’s identity. They become emotional burdens for the person to bear.
air on one side makes the sailboat lean over and the air on the other side
A great explanation for surface tension is “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.” (https://water.usgs.gov/edu/surface-tension.html) Which means, that since the water molecules are bonded together at the surface, they are strong enough to keep an item with much higher density from sinking below
Fluid motion over the objects surface is inducted by buoyancy effects that have resulted from the change in density. This change is due to the differences in temperature of the fluid as heat energy is transferred.
Study is necessary to succeed. Study is a good way to develop our mental. Study can increase our experience and knowledge. Study can also train our mind to understand the complexities of the subject chosen and then apply that understanding in practical terms. Through study, we can learn how to discipline ourselves to do something you don’t want to do, which will help us succeed in anything in our life.
The quality of teaching in a classroom makes the biggest learning outcome. Effective teaching leads to the improvement in a student’s achievement. Measuring effective teaching against the progress of a student is a must. It is the belief of all schools that all students must have equalising starting points which means that no matter what background a child comes from they should have the same opportunity for learning.
In the most basic sense, engineering means “making things happen.” It is the practical application of science and math, the two subjects I am most passionate about, to solve everyday problems. It opens up a world of opportunity to create innovative technology that influences many aspects of people’s lives, this giving an individual the power to make a difference. While I am deeply interested in the subjects that are the foundation of engineering, in addition I have many other personal reasons for pursuing civil engineering in specific. I am motivated by my desire to fulfill my lifelong goal of creating purposeful infrastructure, to make all of my family proud, and to prove that not all engineers