... boomed. Four strokes are the alternative to a two stroke. Four strokes make the combustion process 4 steps instead of two. First, fuel is drawn in, just like a two stroke. As the piston moves up, it compresses the fuel. At this point, the engines show their differences. The four stroke will combust the mixture, making the power stroke, then the piston will come back up, making the ... gases travel outward. The two stroke just pushes the gases out and comes back for more. The ... four stroke has two rotations of the crank for every 1 power stoke. Four strokes have a sump oil system, whi...

• Word Count: 601
• Approx Pages: 2
• Grade Level: High School

... one boat crosses the start at a time, and each is timed separately. Racing starts halfway through the stroke, with the blade perpendicular to, and in the water. Once the flag drops they row 1/2 stroke, 1/2 stroke, 3/4 stroke, then a full stroke. This allows the rowers to converge all of their momentum to pull the boat out of the water ... actual pulling on the oar by pushing off of the foot stretcher. Length in the water is key. With the same power, a stroke twice as long in the water will be twice as effective. A good rower is clever in handling the blade. If they miss water ... is ef...

• Word Count: 1723
• Approx Pages: 7
• Grade Level: High School

... rotate the entire body, pivoting on the back foot. The ball and racket should meet at about the hip level of the player. The player should follow through with the stroke from low to high so that the racket ends up on the opposite side of the body by the neck. The finishing stance should be with the hips and shoulders ... . One of the advantages to looping the forehand is that the player will be able to use gravity to their advantage, which when making a loop, will give the player more power. It is also easier to use the loop forehand to develop rhythm of one's strokes. A disadvantage to ...

• Word Count: 406
• Approx Pages: 2
• Grade Level: High School

... rotate the entire body, pivoting on the back foot. The ball and racket should meet at about the hip level of the player. The player should follow through with the stroke from low to high so that the racket ends up on the opposite side of the body by the neck. The finishing stance should be with the hips and shoulders ... . One of the advantages to looping the forehand is that the player will be able to use gravity to their advantage, which when making a loop, will give the player more power. It is also easier to use the loop forehand to develop rhythm of one's strokes. A disadvantage to ...

• Word Count: 413
• Approx Pages: 2
• Has Bibliography
• Grade Level: High School

... combustion, if there are any other alternatives to it? There is a little known engine called the Wankel rotary engine. This engine is very unlike the regular 4-stroke internal combustion engine used in most cars; it uses no pistons. "Felix Wankel conceived the idea of a rotary engine in 1924" (Marr) which re received a patent for in 1936. Since ... rotor. As the rotor is pushed by combustion around the inside of the housing, it in turn, spins the lobes and the shaft. Producing power for the rotary engine is accomplished in four strokes, like conventional four stroke piston engines, but...

• Word Count: 774
• Approx Pages: 3
• Has Bibliography
• Grade Level: High School

... is a mess and they don't know how they let it get this far, as to say that they don't know how African-American people has gotten so much freedom, and power. Julian doesn't say a word at this point. This caught me off guard because I thought he would stand up for what he believed in and not let them blame all the ... family, even though they were probably of a higher social standing and better off than her. When she falls to the ground she has a stroke, which results in her death. When Julian's mother dies on the sidewalk from the stroke. Julian feels deeply sorry. He regrets what he ha...

• Word Count: 718
• Approx Pages: 3
• Grade Level: High School