2012 Needle through a Balloon Pre-Lab Preparations: Purpose: The purpose of this experiment is to see if the balloon pops when pierced with a wooden skewer or a sharp pin. Hypothesis: If we lubricate the skewer with petroleum jelly‚ then it should go through the balloon without popping. Hypothesis for the 2nd part of the Lab: If we cover the side of the balloon with cellophane tape‚ then it will not pop when pierced with the pin. Materials: • Balloons • Long wooden skewer •
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marked points on the balloon will be farther apart each time the balloon is blown up. Materials: * 1 un-inflated balloon (when inflated‚ the balloon should have a round shape and be approximately the size of a soccer ball) * Markers * About 30 cm (12 inches) of string or yarn * Ruler or tape measure Procedures: 1. Place an un-inflated balloon on a table. The balloon represents the universe. Use a marker to make small‚ filled-in circles on the balloon. The circles represent
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types: Every class • Arrays : int[ ]‚ double[ ][ ]‚ Balloon[ ]‚ defines a type • Predefined: String‚ Color‚ File‚ Scanner‚ … • Programmer defined: CartoonFigure‚ Balloon‚ BalloonGame‚ … • Type of object determined at its creation: • new Balloon(100‚ 300) ⇒ a Balloon object • new File ("data.txt") ⇒ a File object • new int[100][100] ⇒ an array of arrays of int. • "Hello" ⇒ a String • You can have a place of type Object: Object value = new Balloon(100‚ 100); value = "not any more"; There are limits
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the bottom was painted with a top coat of reflection “dope” paint to fool the people below. Inside the Hindenburg‚ there were 16 gas filled pockets. These pockets were filled with hydrogen instead of helium because it is less dense than Helium. (Side note: The fact that hydrogen is less dense than helium is proven because of Avogadro. He stated that if you have two different gases at the same pressure and the same temperature then they would have the same amount of particles. But then that would lead
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is to demonstrate how water temperature affects the volume of a balloon. According to Charles’ Law‚ temperature and volume increase proportionally‚ as long as chemical amount and pressure remain the same. Research Question: How does the volume of a balloon react to changing temperatures? Hypothesis: If we increase the temperature of the water‚ then the balloon will expand. If we decrease the temperature of the water‚ then the balloon will contract. Materials and Procedures: Manipulated Variable:
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Invention: The Hot Air Balloon Djenabou Diallo AP World History: Period 6 March 19‚ 2012 The Hot Air Balloon is the oldest successful flight technology that held people. This invention is in a class of aircraft known as: Balloon Aircraft. Pre-modern & Unmanned hot air balloons were very popular in Chinese history. It was used in the Three Kingdoms era (220–280 AD). In this time frame these pre-modern balloons were used as airborne lanterns for military signaling. These lanterns
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terrestial (inner) vs. jovian planets (outer) * Closer to sun * Smaller sizes and masses * High densities * Rock and metal vs. hydrogen and helium ices * Solid surface vs. none * Warmer surfaces vs. cold temps at cloud tops * Few moons * No rings * SUN = hydrogen and helium * Earth travels around the sun at an average distance of about 149‚600‚000 kilometers (92 million miles) * The sun’s diameter is about 1.4 million km (864
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Arc Welding‚ also known as Tungsten Inert Gas Welding‚ is an arc welding process that uses a non-consumable tungsten electrode to produce a weld. The weld area is protected from atmospheric contamination by an inert shielding gas‚ such as argon or helium‚ and filler metal is normally used‚ except in autogenous welds. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma. GTAW is most commonly
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Other material and particles which collided and stuck together formed asteroids‚ comets‚ planets and moons. The solar wind from the sun attracted all the lighter particles such as helium and hydrogen from the inner solar system planets. However‚ the out solar system had planets with an abundant prescene of hydrogen and helium. Inner Solar System The four smaller and inner planets in our solar system - Mercury‚ Venus‚ Earth and Mars - they are most made up of rock and metals (iron). These four planets
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IceBridge‚ is used to measure the ice elevation of the landmass that the aircraft is flying over. In order for a laser altimeter to be used on a super pressure balloon the weight and size of the instrument must be drastically reduced‚ continuing the trend of the need for much smaller and lighter equipment for use on super pressure balloons. The purpose of the altimeter would remain relatively the same‚ although the effectiveness of the instrument would be hampered. For one‚ scientific planes usually
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