## The Effect of the Height of a Crater on Its Diameter

The Effect of the Height of a Crater on Its Diameter Introduction ============ A crater is formed when a meteor for outer space strikes the lunar surface. The force of the impact obliterates the meteorite and displaces part of the moons surface, pushing the edges surrounding rock. At the same time, more displaced material shoots outward from the crater. I will simulate this in the classroom by using a margarine tub full of sand and using different heights to represent the distance

## Determining The Ratio Of Circumference To Diameter Of A Circle

Determining the Ratio of Circumference to Diameter of a Circle In determining the ratio of the circumference to the diameter I began by measuring the diameter of one of the si objects which contained circles, then using a string, I wrapped the string around the circle and compared the length of the string, which measured the circumference, to a meter stick. With this method I measured all of the six circles. After I had this data, I went back and rechecked the circumference with a tape measure

## An Investigation into the Relationship Between the Resistance of a Wire and Its Diameter and Length

An Investigation into the Relationship Between the Resistance of a Wire and Its Diameter and Length Introduction In this investigation I hope to see whether there is a relationship between the thickness of a wire and its length with the resistance in which it produces. First of all, what is resistance? Resistance is calculated as R=V/I Where R is resistance, V = Potential Difference (Voltage) and I = Current (Amount of charge flowing per second) Resistance is the property of a conductor

## Research Paper On Tennis Racquets

making their nets capable to absorb the impact of their pray. According to the book “The Web of the Spider” by Laura Barr Lougee [3], spider webs are made in such a way to keep all tensions in balance. The NASA research showed that the change in diameter of strings changes the stability of a network. This property of strings was used to improve the performances of tennis racquets. It is hard to define “power” of racquet. According to [4] power could be defined as 1. racquet bounce (high

## Measuring the Resistivity of a Wire

constant throughout the experiments and only change the diameter of the wire. For each width I will record the p.d. and current displayed on the voltmeter and ammeter. I will then use these values to calculate the resistance of the wire at that length using the formula: [IMAGE]V = IR or R = V (where V = p.d., I = Current, and R = Resistance) I I will then find the cross sectional area of the wire. To do this I will find the diameter of the wire using a micrometer. Then I will find the

## Turning a Mild Steel Bar

steel bar to work into the shape shown in the drawing found on the following pages, to do this we used the Turning Lathe in the workshop, but before we could start some measurements had to be taken. This meant using a micrometer to determine the diameter of the bar to begin with. A micrometer allows a measurement of the size of a body. It is an extremely accurate piece of apparatus. The Thimble is rotated, causing it to move right or left. It is connected to the right-hand Measuring Rod. The

## The Electrician's Dilemma

two resistances: 1.9 ohms and 28.5 ohms. I am to find out how to do this. I will be provided with different reels of wire of constantan, each reel having a different diameter. I will, for three different diameters, find the resistance of the wire at different lengths. For example, I will take the 24 gauge wire (0.56mm diameter) and find its resistance when it is at 100cm, 80cm, 60cm, 40cm. Exactly how I will do this will be in my method. I will then plot a graph of resistance (Î©) against

## Asteroid Collision With The Earth

would like to mount a full-scale search for such asteroids, partly out of a fear that they may collide with the Earth. Collisions with larger asteroids are rare, but smaller ones are more numerous. It is estimated that a few asteroids with a diameter of 1 km (0.6 mile) may collide with the Earth within a period of 1,000,000 years. If an asteroid of this size were to collide with the Earth, it would produce an explosion with as much force as several hydrogen bombs. A short-term disturbance

## Concepts Of Lifetime Fitness

produces heat. If the body temperature does not rise immediately after this, then a second function begins. The brain will signal the blood vessels near the skin to constrict or narrow in diameter. This occurs so the heat deep in the muscles is conserved. Since the vessels are now smaller in diameter, less blood is needed to fill them. Since less blood is needed through the vessels, the heart begins to slow. If the body remains in this slowed state, hypothermia could result. Hypothermia

## Coiled Tubing

used in field operations such as well service, workover applications (petroleum industry well work), and drilling and completion applications. Just as is sounds, CT is essentially a continuous tube with a diameter of .75 inches up to 4.5 inches that is reeled onto a spool, which has a core diameter of approximately eight to twelve feet. The tubing is made from rolling strip metal, usually a carbon based steel, into cylindrical form and weld along its entire length. The longitudinal weld is made using

## Hurricanes

the ocean while simultaneously the high pressure higher in the atmosphere pushes it outward” ( Longshore 1). As the clouds turn into a tight curl, the depression becomes a tropical storm. Due to low central pressure air spiraling cyclonically, the diameter of what is known as the “eye” of the hurricane is anywhere from ten to twenty miles. Hurricanes and tropical cyclones form, maintain their strength, and grow only when they are over ocean water that is approximately 27°C (80°F). This type of warmth

## Wire Resistance Investigation

Wire Resistance Investigation Planning -------- Aim --- In this experiment the resistance change in a wire will be investigated. I will be investigating if the thickness or cross-sectional diameter of the wire affects the resistance. Variables --------- The input variable will be the thickness of the wire to the nearest millimetre. The output variable will be the readings on the ammeter and voltmeters. The controlled variables will be the length of wire and the current

## Investigating the Resistance of a Wire

equation A= Ï€(d/2 x10 Â³)Â² where d is the diameter of the wire in mm. I will plot a graph of length on the x-axis against resistance on the y-axis. From the relation R = PL /A which corresponds to the straight line equation y=mx+c the graph should be a straight line passing through the origin where m is the gradient of the straight line graph that corresponds to P/A. Since the cross-sectional area of the wire can be found by measuring its diameter. Therefore the resistivity of the wire can

## Mars Essay

planet from the sun at about 228 million-km (141 million miles) and the last terrestrial planet from the sun. The next five planets in order from the sun are gaseous. Mars follows closely behind Earth but is comparatively smaller, with about half the diameter of Earth and about one-tenth of Earth&#8217;s mass. Thus the force of 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

## Hovercraft Project

Stem report The project I chose to do was hovercrafts. Hovercrafts are a mode of transport which is not very popular yet but, I think they are extremely interesting. The basic components of a hovercraft are: • The skirt • The platform • The fan • The rudder The skirt is a piece of material which is attached to the platform. There are small holes underneath the skirt which allows air to come out and creates a platform of air for the craft to rest on. The platform is the main base of a hovercraft.

## Building A Campfire

three categories to classify it under. Kindling is the stuff that is easiest to burn. It could be leaves, dryer lint, or very small twigs. The next size of wood is sticks and small logs. These will range in size from one half inch to two inches in diameter. Anything larger than this is classified as the fuel. The fuel is the big logs that will burn for hours. When a fire is started it needs to be built like this: kindling first, then sticks and small logs, and then the fuel, once the fire is going

## Uranus

Uranus 2,870,990,000 km (19.218 AU) from the Sun, Uranus hangs on the wall of space as a mysterious blue green planet. With a mass of 8.683e25 kg and a diameter of 51,118 km at the equator, Uranus is the third largest planet in our solar system. It has been described as a planet that was slugged a few billion years ago by a large onrushing object, knocked down (never to get up), and now proceeds to roll around an 84-year orbit on its belly. As the strangest of the Jovian planets, the description

## Factors Affecting the Resistance of a Metal Wire

investigation into how resistance depends on the number of identical resistors connected in series, so this circuit will be used for this investigation, too. Variables and Constants 2. Possible variables include the length of the wire, the diameter of the wire, the material of the wire and the temperature. The chosen variable is length of the wire. Because this is the chosen variable, all of the others must be kept constant. The graph I will plot will be the length of the wire (in cm) against

## Hurricane Floyd

can throw at us. Every year people who live on the coasts fight hurricanes with no dismay. A hurricane is simply too strong. Their winds reach speeds of 75 mph. The winds around the eye wall can reach 130 to 150 mph. They are 200 to 300 miles in diameter. The number of casualties is endless, as well as the widespread destruction that takes millions of dollars to repair. Even if the hurricane doesn’t cause a lot of damage, the storm surge will. Storm surge is the great tidal waves that crash

## Mathematics of the Human Eye

others? Well my friend, look no further... the answers to your 2 most burning questions are about to come! First of all, what happens when we see images? Our eye acts as a simple model of a lens system. The average adult eye is about 25 mm in diameter. As light enters our eye, it is refracted first through the cornea which does about 80% of the refracting. The crystalline lens which is located after the aqueous humour (just under the cornea) approximately contributes the rest. Muscles around the