Universal Standard Measuring System (SI units) in Scientific Work

Importance of a Universal Standard Measuring System (SI units) in Scientific Work A universal standard measuring system removes the confusion that may arise by using different measurement systems. By adopting one system of measurement, it is possible to compare the results and justify the procedure and findings achieved than when different measurement systems are used. For instance, in 1983, the new Air Canada Boeing 767 was designed temporarily without functional fuel gauges and had different fuel density than other old models. When the crew decided to calculate the volume of the fuel left, they used a dipstick reading, similar to finding the volume of oil in the car. They applied the density of the old planes to calculate the volume. The old planes jet fuel density was 1.77Ib/L while Boeing 767 was 0.8kg/L. Consequently, the actual volume of oil in the jet was half the calculated volume by the crew. Boeing 767 was not able to reach its destination and was forced to land on a nearby Airforce base.

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The universal standard measuring system also ensures that products made in different countries can be fit for use anywhere in the world. For instance, there are different types of tires for different classes of motor vehicles. The SI units ensure that tires of a particular class of car can be used in any country, regardless of the country of origin.

One of the reasons for the U.S. not adopting the SI units is probably the cost of retooling its industrial processes to match with the new system. Most of the opposition for the metric system came from the U.S. engineers and industrialists (Appelbaum 12). On the other hand, the U.S. simply fears to adopt what other countries have developed. The national pride and fear of infringing national sovereignty are the major obstacles. However, the U.S. will gradually adopt the system as seen on some of its roads where it is using the metric system.

Q.2. Acceleration at each point of a car turning a corner Acceleration refers to the changes in velocity of a moving object at given time interval.

Therefore, there is a close relationship between velocity and acceleration, sometimes leading to confusion that the two are the same thing. Take for example a car travelling at a constant velocity of 65 km/hr, and it is approaching a corner. At the point where the car enters the corner, the velocity of the car changes and it begins to accelerate. Since the car is slowing down as it is entering the corner, the acceleration at this point is in the opposite direction of its travel. When the car begins to exit the corner towards the straight road, it begins to speed up until it reaches 65km/hr. At this point, the acceleration is in the same direction as the direction of travel. This is according to the general principle of acceleration, which states that when a moving object is slowing down, then its acceleration will be in the opposite direction of its motion (Clegg 35).

The acceleration becomes zero when the car finishes negotiating the corner and begins to travel at a constant velocity of 65km/hr because the road is straight after the corner; hence, no changing

direction. However, the car will experience constant acceleration if it keeps increasing the speed at constant amount after every second or minute.

The car acceleration is the same direction as the car speed up as it exits the corner. The car continues to speed up until it reaches a constant speed of 65km/hr throughout the remaining journey. At a constant speed of 65km/hr, the acceleration is zero.

At this point, the car is still slowing This is the turn-in point when the however, car beginsits acceleration is down; changing since it is changing its to enter the corner, at this point the car slows direction.

Acceleration can change down and its acceleration is in the opposite with an increase in velocity or change direction in direction.

Works Cited Appelbaum, Yonnie. “Who’s Afraid of the Metric System? A Historian Explains Why the U.S. Still Hasn’t Adopted the Global Standard.” 2018. Web. 6 September 2018. <https://www.theatlantic.com/technology/archive/2015/06/whos-afraid-of-the-metricsystem/395057/> Clegg, Brian. The Universe Inside You: The Extreme Science of the Human Body from Quantum Theory to the Mysteries of the Brain. London: Icon Books, 2012. Print.