# Motion

Newton’s Laws of Motion clearly define force and motion. The following equation defines force, and what is required to achieve it. (F = ma) In order to achieve force, you must have both mass and acceleration. Thus, if you have an elephant, but it is not moving or producing any kind of acceleration, its mass does not account for its lack of acceleration, and there is thus no force. If an elephant kicks a beach ball, however, there is both mass and acceleration, and thus, force.

What happens if a mouse kicks a beach ball? Will it have the same effect? Despite the mouse having a much smaller mass than the elephant in the previous example, Newton’s second law of motion does not discriminate the mass, or the acceleration, by its quantity. Thus, if a mouse were to kick a beach ball, it would indeed have the mass and acceleration necessary to cause force, and the ball would in turn travel, even if just a few millimeters. In conclusion, the second law of motion explains that motion and acceleration together create force.

Science 8 Week 41

# Three Fields Of Engineering

There are many different engineering fields we could discuss, but today I will only be describing three of them: civil engineering, mechanical engineering, and biomedical engineering. Each of these fields play critical roles in various aspects of innovation, infrastructure, and problem solving. We will begin with civil engineering. Civil engineering primarily consists of the planning and construction of infrastructural buildings and establishments. This is therefore one of the most important fields of engineering. Architects and engineers work together to make buildings and other structures safe and professional-looking. The architect handles the design aspect of a build whilst the civil engineer works to execute the architect’s plans.

Mechanical engineering is among the oldest fields of engineering, and combines mathematical and physics properties into one broad field. Being a very multifaceted industry, mechanical engineering can cover anything from constructing machines to the production of transportation modes. There are many different branches of mechanical engineering, all of which specialize in some aspect of mathematics and/or physics.

Lastly, biomedical engineering is the application of engineering to the human body, generally in a medicinal or otherwise beneficial manner. Biomedical engineering applies engineering principles to biology, and is thus a good career choice for anyone who has an interest in biology and mathematics.

In conclusion, there are many types of engineering fields, all of which serve important purposes in society and whose work can be seen in our everyday lives. We have discussed just three of these in today’s essay. Thank you for reading, and please leave your feedback below.

Science 8 Week 40

# The Great Wall Of China

The Great Wall of China is an enormous wall made of a variety of substances located in Northern China. The wall was constructed throughout the late B.C. era and the early A.D. era, beginning with individual walls that would later be connected to form the Great Wall. The wall is made of brick, wood, stone, and rammed earth, and was the longest wall in the world, spanning over 5,500 miles. The wall was built to protect from outsiders, and was rather effective, as the walls reached as high as 16 feet in some areas.

Completed in 1878 after several thousand years’ construction and the loss of many thousands of lives, the Great Wall of China serves today as more of a tourist attraction than as a means of military defense, which was the original purpose of the Great Wall. Some portions of the wall have since become buried or destroyed by erosion and other natural causes. Thus, a present day map of the Great Wall depicts significant gaps between different segments of the wall.

Science 8 Week 37

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