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Introduction to Physics

Physics is the science that studies the principles that govern the behavior of matter and energy, establishing laws and principles that explain their relationship without altering the internal nature of matter.

Science & Physics

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Science & Physics

Next, consider a GPS system. Physics describes the relationship between the speed of an object, the distance it travels, and the time it takes to travel that distance. When you use a GPS device in a vehicle, use these physical equations to determine travel time from one location to another.

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Applications of Physics

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You don't have to be a scientist to use physics. On the contrary, knowledge of physics is useful both in everyday situations and in non-scientific professions. It can help you understand how microwave ovens work, why you shouldn't put metals in them, and why they might affect pacemakers.

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Applications of Physics

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In the biological sciences. At the microscopic level, it helps describe the properties of cell walls and cell membranes.

On a macroscopic level, it can explain the heat, work, and power associated with the human body.

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Models, theories and laws; The Role of Experimentation

They are examples of people who worked with Isaac Newton and Marie Curie.The cornerstone of the discovery of natural laws is observation;

Models, theories and laws; The Role of Experimentation

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Models, theories and laws; The Role of Experimentation

Models, theories, and laws are used to help scientists analyze the data they've already collected.



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An example:

Let's say you try to start your car, but it won't start. No doubt you're wondering: Why won't the car start? You can follow a scientific method to answer this question. First of all, you may do some research to determine a variety of reasons why the car won't start. Next, you will present a hypothesis. For example, you may believe that the car is not starting because it does not have engine oil. To test this, open the hood of the car and examine the oil level.

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Physics also explains:

The reason why a black car radiator helps remove heat in a car's engine. Why a white roof helps keep the inside of a home cool. Similarly, the operation of a car's ignition system.The transmission of electrical signals through our body's nervous system are much easier to understand when you think of them in terms of basic physics.

Science consists of the theories and laws that are the general truths of nature as well as the body of knowledge they encompass. Scientists are continually trying to expand this body of knowledge and refine the expression of the laws that describe it. Physics is concerned with describing the interactions of energy, matter, space, and time. In general, the goal of physics is to describe basic phenomena in nature.

Define a problem based on a specific body of knowledge, for example: biology, chemistry, physics, and earth/space science, and do the following: 1. Pose questions about the natural world, (Articulate the purpose of the investigation and identify the relevant scientific concepts). 2. Conduct systematic observations, (Write procedures that are clear and replicable. Identify observables and examine relationships between test (independent) variable and outcome (dependent) variable. Employ appropriate methods for accurate and consistent observations; conduct and record measurements at appropriate levels of precision. Follow safety guidelines). 3. Examine books and other sources of information to see what is already known,


4. Review what is known in light of empirical evidence, (Examine whether available empirical evidence can be interpreted in terms of existing knowledge and models, and if not, modify or develop new models).5. Plan investigations, (Design and evaluate a scientific investigation). 6. Use tools to gather, analyze, and interpret data (this includes the use of measurement in metric and other systems, and also the generation and interpretation of graphical representations of data, including data tables and graphs), (Collect data or evidence in an organized way. Properly use instruments, equipment, and materials (e.g., scales, probeware, meter sticks, microscopes, computers) including set-up, calibration, technique, maintenance, and storage). 7. Pose answers, explanations, or descriptions of events, 8. Generate explanations that explicate or describe natural phenomena (inferences), 9. Use appropriate evidence and reasoning to justify these explanations to others, 10. Communicate results of scientific investigations, and 11. Evaluate the merits of the explanations produced by others.

As we become serious about exploring nature, we become more organized and formal in data collection and analysis. We try for greater precision, run controlled experiments (if we can), and write down ideas about how data can be organized and unified.

Physics can also explain sensory phenomena, such as how musical instruments make sound, how the eye detects color, and how lasers can transmit information.

As scientists inquire and gather information about the world, they follow a process called the scientific method. This process usually begins with an observation and a question that the scientist will investigate. Next, the scientist usually conducts some research on the topic and then comes up with a hypothesis. The scientist will then test the hypothesis by conducting an experiment.