... battery), which provides a mechanism for charge to flow between positive and negative electrodes, and a separator, which isolates each charge. When a battery is inserted into a circuit, a charge flows around the circuit in a loopy pattern. Electrons result in electrical current on the outer part of the circuit while the charge ... electronic device such as a Discman, a remote control, or even a Gameboy. Over the decades, scientists have developed the technology to place thin film inside thin microchips that will one day allow us to make appliances and electronic devices smaller and fast...

• Word Count: 1207
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate

... , which are connected to the crankshaft, the pistons jobs are to be the recipient of the combustion from the spark which is mixed with the gas-air mixture. The piston are connected to the crankshaft with a rod cap and the rod bolts in between the piston and the crankshaft is something called a ... engine. The four-stroke cycle is the foundation of the engine. The first stroke is the intake stroke which the intake valve opens and the air and gas mixture enter the combustion chamber. The second stroke is the compression stroke and when that occurs the piston heads towards the bottom of ......

• Word Count: 511
• Approx Pages: 2
• Grade Level: Undergraduate

... than the fire. Dust blocked sunlight from the earth's surface for many months. Burned sulfur from the impact site, water vapor and chlorine from the oceans, and nitrogen from the air combined to produce worldwide fallout of intensely acidic rain. Scientists postulate that darkness and acid rain caused plant growth to die. As a result, both the herbivorous dinosaurs, which were dependent ... ago and caused the mass extinction, a hypothesis that has received considerable empirical support. The discovery of the centimeter-thick layer of clay at the boundary was also opportune. Alvarez foun...

• Word Count: 1029
• Approx Pages: 4
• Grade Level: Undergraduate

... magnitude of capillary forces is thus variable, and can be much smaller or much larger than the gravitational force. An example of capillary forces exceeding gravity is capillary rise in a thin glass tube, where water is lifted upwards against the force of gravity. Most Earth materials are hydrophilic, which means that water adheres to them rather than being repelled. As a result ... , water in the unsaturated zone is preferentially drawn into small spaces over large ones, which tend to be occupied by air. In un-fractured rock, water occupies a three-dimensional network of interconnected...

• Word Count: 696
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

... airport. This relatively small and unsophisticated operation all changed in 1977 when the government deregulated the airline industry and provided the company an opportunity to expand. The company entered the air express industry by leasing, and later buying, the services of Midwest Charter in Wilmington, Ohio. The purchase of the small airline included the airport in Wilmington, which is now ... over 12,000 delivery vehicles that transport packages to customers. Together with their airfreight, these ground deliveries, which are far less costly than airfreight, have helped Airborne Expr...

• Word Count: 922
• Approx Pages: 4
• Grade Level: Undergraduate

... solar energy is by using one of two potential and different kinds of artificial collectors. These artificial collectors can be either flat plate or concentrating collectors. Flat plate collectors are thin boxes with a see-through cover. These collectors are then placed on rooftops facing the direction of the sun and are used for water and space heating. Concentrating collectors, however, ... large windows and absorbing materials. If a building is designed in this manner it can reduce an energy bill by up to 50 percent. For the purposes of cooling, an absorption air conditioner uses a so...

• Word Count: 720
• Approx Pages: 3
• Grade Level: Undergraduate

... others insist on calling it a proven set of facts. Although opinions are various, they both consider global warming is climate change that is leading to an increase in the overall air and water temperature. Furthermore, both opinions agree that this trend will have a great impact on Earth (Global Warming.com, 2012). Earth absorbs energy from the sun; at the same time ... , Earth re-radiates the energy back into space. Normally, the thin layer of atmosphere can trap a portion of the outgoing radiation, which keeps Earth's temperature within a comfortable region; nevertheless, the layer of...

• Word Count: 1061
• Approx Pages: 4
• Grade Level: Undergraduate

... ground can absorb, the excess water flows to the lowest level, carrying loose material with it. Gentle slopes are subject to sheet and rill erosion, in which the runoff removes a thin layer of top soil. Glaciers are important agents of erosion. Although a glacier moves slowly, it gradually removes all the loose material from the surface over which it travels, leaving bare ... arid climates with little vegetation. Wind blowing across bare land lifts particles of sand and silt but leaves behind larger pebbles. Very small soil particles can be suspended in the air and carried away with the...

• Word Count: 797
• Approx Pages: 3
• Grade Level: Undergraduate

... fate of the family who lived in the house before their untimely demise (Chronicles 167). Based on the description of their silhouettes being etched into the side of the house due to an atomic blast having disintegrated them, a general conclusion by the reader can be drawn that there were ... likely any survivors, at least within or around the city where the house still stood, and yet suddenly a dog appeared seemingly from out of thin air. The animal's presence further added to the confusion when it died from starvation and possibly its wounds, where after an hour had passed, the ... demi...

• Word Count: 965
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... Family, whether realized or not, is permanent. Generations come and different traits are passed on, yet as different members of families marry into others, their own respective family unit remains. They can never break that thread of relationship. They are completely and irrevocably tied by blood ... His struggles continue into adolescence, when he finds his father intimidating and unworthy of his respect. He obeys his father when need calls for it, but by the time he is fourteen, the only similarity he finds that he shares with his father is "his love of good shoes and fine thin socks. ...

• Word Count: 769
• Approx Pages: 3
• Grade Level: Undergraduate

... today will decide and determine whether the world goes up from here or continues to slide into a new dark era. It is important to understand that injustice doesn't just happen out of thin air. The societal authority and influence that perpetually corrupts is the sole cause. A society is ... Lying is done through the manipulation of words, but also through plain silence. In The Crucible by Arthur Miller one inconsequential injustice developed into a significant injustice that caused the death of many, but was created through a small lie that was silenced and fluctuated. The very ... Abig...

• Word Count: 995
• Approx Pages: 4
• Grade Level: Undergraduate

... Rocky Mountains, are already constrained by climate, and are likely to face extreme stress and disappear entirely in some places. Global warming suggests the potential for forests to break up into an assortment of forests, savannas, and grasslands. Major adjustments to natural ecosystems due to climate change could have negative consequences for our economy, which depends in part on the ... return to the atmosphere. Trees also have a crucial role in the oxygen cycle: they make up an essential part of one of the world's life support systems. Agricultural expansion into forestland is the ...

• Word Count: 700
• Approx Pages: 3
• Grade Level: Undergraduate