Physics studies the matter and chemistry studies the relationship between substances, right? Why there is a seperate discipline if Physics contains chemistry?
Physics - A study of the actions of the world; how things move, how forces affect the world, and the hidden mathematics of the universe unseen to the eye. Chemistry - Physics without the mathematics; study of interactions of the atomic and molecular world. Chemicals make up the universe and chemistry is what organizes its elegance into a useful and groundbreaking form. So to seriousness, chemistry and physics have a lot of differences, but they do tend to cross over in certain ways. When you study chemistry, the main thing that you study, and the fundamental part to chemistry, is electrons. Chemical bonds and almost all inter-molecular forces are based on electrons and protons, but electrons play a slightly larger role. Electrons allow explosive sodium metal and toxic Chlorine gas to form neutral and tasty table salt. Electrons determine the strength of those bonds and how hard it is to break them. Chemistry helps you organize and understand very large molecules, and to determine their properties and limitations. Then we have where physics and chemistry overlap. Electrons, even though we talk about them as points and particles, are very much more complicated than anyone, even Niels Bohr, could touch. Electrons turned out to also be waves and not just particles. This meant pin pointing their positions and momentums utterly difficult or just plain impossible. In this case, chemistry needed a little help from its old friend physics. Physics helped explain these phenomena, and helped us understand how to use the new model for atoms to our advantage. It was Erwin Schrödinger and Linus Pauling, along with others who helped the world discover the truth about atoms—that they were even stranger and unorthodox than we had ever previously imagined. Now, Physics. Physics, like I have said, reaches out to chemistry a bit when it comes to the subatomic level. But physics is so much more. In physics, frequently you work with motion and forces: You deal with velocities, accelerations, and positions, but also how they relate and how you can go from one to another. For example given acceleration and time you can find velocity and position of anything given enough information. Forces are the most important interactions in the universe. Without them, the universe would crumble to nothingness—they hold atoms together along with bridges and buildings. There are many different types of forces and all have their unique effects. Gravity holds us down on the planet but also keeps the solar system in order. But here we come to an issue that one of the greatest scientists ever to live, Albert Einstein, found an issue. He realized the model for gravity and motion that Newton set up was at fault, it was not complete. So he discovered a new model, based on “relativity”, which establishes how moving at speeds close to the speed of light can literally change how you see reality. Overall, physics and chemistry are very different sciences. Chemistry is much more hands on, and physics much more mathematics based. Physics deals with actions, but chemistry does as well, but we view them differently to each other. They may seem different, as they are, but on a fundamental level they are actually quite the same.
We all know biology studies the living organisms but why do we need to study biology?
Biology plays an important role in the understanding of complex forms of life involving humans, animals and plants. Understanding these intricate details of life helps humans understand how to care for themselves, animals and plants in the proper manner. Biology helps individuals understand the interaction between humanity and the world. It also develops interests in the lives of living organisms in an effort to preserve them. Through studying biology, pathologists understand the human body, the functions of various organs, how diseases affect the body and ways to effectively control diseases. Veterinarians have to study biology to appreciate the functions of animals, including marine animals and creatures that live on land. Environmentalists rely on the study of biology to learn how man’s actions affect his surroundings and the ecosystems of other living beings. Studying biology is the foundation of all characteristics of life on Earth. Apart from creating solutions to the challenges many living organisms face, it paves the way for inventions and discoveries that improve the quality of life. Without studying biology, humans would probably never realize how important maintaining a healthy ecology is for themselves, animals and plant life. Additionally, studying biology enables the use of forensics to trace and arrest errant members of the society. It also allows agriculturalists to rear unique breeds of plants and animals.
Why do we have algebra?
In its simplest form, algebra involves using equations to find the unknown. Real-life problems probably spurred the development of algebra, which dates back over 4,000 years to the ancient Babylonians. For example, a wagon carrying a load of hay bales hits a rut in the road and six bales fall off. How many bales of hay were originally on the wagon if 10 are left? The expression x – 6 = 10 would represent the simple algebraic equation to answer this question. In this equation, x represents the unknown (how many bales of hay were on the wagon at the start) and equals 16 when the equation is solved by adding six to each side of the equation. Algebra gets much more complicated than that simple equation, leaving many students WONDERing when, if ever, they'll use algebra in real life in the future. Does it have any use? If not, why do you have to learn it? For starters, algebra is foundational for advanced math classes, as well as many of the other subjects you'll learn as you proceed through high school and then college. Learning algebra helps to develop your critical thinking skills, including problem solving, logic, patterns, and deductive and inductive reasoning. Many professions, especially those in science and math, require an extensive knowledge of algebra. Even if you don't go into one of those fields, you'll probably use algebra without even realizing it! Consider these examples: It's time to fill up your car's gas tank. The price of gas per gallon is $3 and you only have $25 to spend. How much gas can you purchase? This can be answered by the algebraic equation, 3x = 25. You must divide each side of the equation by 3 in order to isolate x. In this equation, x is equal to 25 divided by 3, which is 8.33 gallons of gas. If you need 10 gallons of gas, how much money do you need? When you solve that equation, you have algebra to thank! Or how about this example? You would like to purchase Internet service for your home. Company A requires a setup fee of $10 and charges a monthly fee of $25. Company B does not charge a setup fee but charges $26 per month. Which company is less expensive for one year of service? We can find out by first calculating the total cost for Company A: x = $10 + $25*12 (months in a year), which comes to $310. The equation for Company B is x = $26*12, which totals $312. At first glance, it might have seemed like Company B would be cheaper, because they do not charge a setup fee, but algebra showed us differently! There are many other examples of real-world uses of algebra, from comparing prices on similar products in a grocery store, to figuring out what time you need to leave your house in order to meet a friend across town on time. If you ever WONDER why you need to learn something like algebra, don't be afraid to ask your teacher or parent (or Wonderopolis!). Odds are, there's a good reason!