The Role of Physics in our Daily Life Essay Assignment Sample
We are in the era of science and technology, and the application of science to everyday life has greatly improved it. Even in the days before science was widely known, people's lives were nonetheless guided by the theories of many scientific disciplines. When we start a fire, it's a chemical process; when we eat and digest food, it's a biological process; when we walk on Earth, it's governed by physical laws; when an earthquake happens, it's a seismic activity; and when we discuss the various terrains and gems of the Earth's surface, it has to do with geology. No one of our daily activities defines one particular scientific field above another. In a similar way, physics influences our daily actions and plays a part in many of the items and activities we do. Here, in this science assignment, we'll talk about how physics affects how our daily activities function and helps us complete our chores, errands, and duties efficiently.
Due to the fact that it deals with concepts such as matter, force, energy, and motion, physics is regarded as a natural science. We can state that physics investigates how the cosmos operates, how Earth revolves around the sun, how lightning strikes, how our refrigerator operates, and many more tasks that are relevant to daily life. In a nutshell, physics describes how everything around us functions. Nothing can be separated from science, and the miracles of Physics are an integral part of our world. Numerous items in our environment operate according to the rules of physics. We can utilize our understanding of physics to explain our various actions. Here, we'll talk about a few instances that will help us understand how physics affects our daily lives.
The simple act of walking involves many physics ideas. It involves the ideas of weight, friction, the gravitational law, Newton's three laws of inertia, and potential and kinetic energy. We actually behave like an inverted pendulum as we walk. Our foot becomes our axis when we place it on the ground, and our mass is then centered in our belly, describing the shape of an arc. When we place a foot on the ground, we really apply weight, or w=mg, and push backward. In reaction to our weight, the ground exerts an opposing, vertical force on our leg, which slows us down. This slowing process continues until our leg is closest to our belly. Kinetic energy is at its peak while the leg is moving, and potential energy is at its peak when the leg is closest to the belly or forms an arc. The stored potential energy is changed into kinetic energy when a subsequent action is taken, and so on. Because not all potential energy is transformed into kinetic energy, we swing as an imperfect pendulum. Only 65% of the energy needed to move forward comes from potential energy that has been saved; the other 35% comes from biochemical processes. In Kunzig (2001).
Physically speaking, when we exert force and, as a result of that, travel a distance, we truly accomplish work when we walk. This is because W=F*S. Newton's three laws of motion are used when walking. According to the first law of motion, a body stays at rest unless a force is applied to it. Inertia is greatest when we are at rest. The most force is required by the body to break out of its condition of inertia, which occurs when we begin to walk. When we take our initial stride, energy is transmitted from our feet to our upper bodies, and we begin to move. As we walk, inertia constantly changes, increasing when we place our foot on the ground and decreasing when we lift it up. In accordance with the second rule of motion, which states that acceleration is directly proportional to the force we use or exert when walking, our acceleration will rise as our force increases. In accordance with the third law of motion, when we step on the ground, we exert force on it, and as a response, the ground applies a reactive vertical force to the body. (2011) Patricia Ann Kramer
Physics' field of thermodynamics deals with heat, temperature, and the work it causes. Energy can be moved from one medium to another in the form of heat or heat transfer. Heat moves from a hotter surface to a cooler surface for heat transfer. When we place a pan on a burning fire with water or another object inside of it, the energy in the stove's flame reaches the cold pan and begins to transfer heat to it, making the pan hooter. Conduction is the name of this phenomenon. Convection is the mechanism through which molecules in gases and liquids move. Once the water molecules at the pan's base have heated up sufficiently to become hotter than the molecules surrounding them, they begin to move toward the water's surface as the pan is heated. Due to reduced heat energy, the water molecules on the surface are cooler and heavier from hot water. Thus they begin to move downward. This process continues until all the water is at the same temperature (ouchmath, 2011)
The loss of both mass and energy during cooking makes it an open system. The zeroth rule of thermodynamics states that energy should be conserved. In our example, the energy lost by the flame is utilized by the pot to heat the water, preserving the overall amount of energy. By utilizing the kinetic energy of molecules to bring about chemical changes in food, a pressure cooker satisfies the law of thermodynamics that spontaneous works are performed as a result of work energy. 2013 (Lethbridge)
Cutting Fruits and Vegetables
We never consider the role of physics in a basic operation like cutting fruit and vegetables, yet it must be. We need to apply pressure to the knife in order to cut anything. We may simply cut an object when we apply more pressure. In other words, pressure is inversely and directly dependent on both area and force. In layman's words, we can state that if we apply greater force, we can cut an object with ease, but if we apply the same force with a knife with thicker edges, we cannot. Experience has shown us that knives with smaller surface-area edges can assist in quickly cutting an object. Similar to how a sharper knife makes cutting easier, Due to the blunt knife's rough edges, there is greater friction, which makes cutting an object challenging.
We should be grateful to God for giving us eyes. By means of this tiny organ, we may view the wonders of the world. The main idea is that we are discussing biology when we discuss body parts and their functions. We fail to see, however, that the operations of the components of our bodies are likewise governed by the laws of physics and chemistry. If we discuss sight, we learn that our eyes function as a camera to view the world around us. Our eyes' convex lens converges or concentrates light. The cornea and lens in our eyes focus light when it enters. The iris regulates the quantity of light entering the eye and produces a true, inverted image on the retina similar to that of a camera. Photoreceptors transform the light's image into an electrical signal, which is then transmitted via the optic nerve to the brain's visual cortex. The vision center analyses the electric signal and sets it up so that it may be seen by the eye in its original form. The amount of light reflected from that object is what allows us to view the image. We cannot see in the dark because of this. Edwardson (2005)
The eye is able to distinguish between various objects' colors and shapes. When light, which has seven hues, strikes an object, like a red book, it absorbs all the colors and reflects the red color. This makes it easier for us to understand why the book's cover is red. Because white objects reflect all hues when light strikes them, they appear white (we also regard light as white light). Similarly to this, a black item seems black because it completely absorbs the light that strikes it and does not reflect any of it. (2010) Pappas
Opening and Closing Doors
Hinged doors' opening and shutting are likewise governed by physics. Torque is the phenomenon involved in door opening and closing. The amount of torque needed to rotate an object around its axis or fulcrum. When opening a door using the handle that is furthest away from the hinge, we can simply accomplish so by creating torque using the formula ®=F*l sin, where l is the distance between the hinge and the door knob or handle. (AP Only) Lesson 27a: Torque, 2013)
If the knob is close to the hinge, more torque must be applied, which results in less angular acceleration. Greater angular acceleration is produced when force is applied perpendicular to the door. By exerting pressure on the doorknob, we may cause the door to revolve around its axis and work with the torque principle. When we open the door clockwise, the torque is positive; when we open it anticlockwise, the torque is negative. Broholom (2007)
We have only seen a small portion of physics here, but this discipline governs all of life. Many natural phenomena are governed by physics, which also defines many manufactured items like cars, refrigerators, microwaves, and escalators. Consequently, we might state that physics governs our universe.
Broholom, C. (1997, October 20). Opening a door. Retrieved from John Hopkins University: http://www.pha.jhu.edu/~broholm/l18/node3.html
Edmondson, R. (2005, November 11). How are we able to see things? Retrieved from MyUniversalFacts: http://www.myuniversalfacts.com/2005/11/how-are-we-able-to-see-things.html
Kunzig, R. (2001). The Physics of Walking. DISCOVER Vol. 22 No. 07.
Lethbridge, A. (2013, June 06). Thermodynamics of Cooking. Retrieved from Science fare: http://sciencefare.org/2013/06/26/thermodynamics-of-cooking/
Lesson 27a: Torque (AP Only). (2013, March 12). Retrieved from studyphysics.ca: http://www.studyphysics.ca/2007/20/ap_torque/27_ap_a_torque.pdf
touch math. (2011, January 25). THE PHYSICS OF COOKING. Retrieved from OUCH MATH: http://ouchmath.wordpress.com/2011/01/25/the-physics-of-cooking/
Pappas, t. (2010, April 29). How Do We See in Color? Retrieved from Live Science: http://www.livescience.com/32559-why-do-we-see-in-color.html
Patricia Ann Kramer, A. D. (2011). The Energetic Cost of Walking: A Comparison of Predictive Methods. PLoS ONE, 6(6), doi: 10.1371/journal.pone.0021290.