Education & Communication
Last modified: 2025-01-24 13:01
Capacitance is a scalar physical quantity that measures the ability of an object to store an electric charge, as occurs for example for capacitors, fundamental elements of electrical and electronic circuits. The unit of measurement of capacitance or electrical capacity is the farad (F).
Last modified: 2025-01-24 13:01
Force is an important concept in physics and is defined as a factor that changes the speed of an object or its direction of movement or rotation. A force can accelerate objects by pulling or pushing them. The relationship between force, mass and acceleration was defined by Isaac Newton in his second law of motion, which states that the force of an object is the product of its mass and acceleration.
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The center of gravity is the center of weight distribution of an object, the point where the force of gravity can be assumed to act. It is the point where the object is in perfect balance, no matter how it is turned or rotated around that point.
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This article will tell you how to calculate the escape velocity needed to escape a planet's gravity. Steps Step 1. Calculate the mass and radius of the planet you are dealing with For the earth, assuming you are at sea level, the radius is 6.
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What is the difference between mass and weight? Weight is the effect that gravity has on an object. Mass, on the other hand, is the quantity of matter of which an object is composed, regardless of the force of gravity to which it is subject.
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Specific heat is the amount of energy needed to increase a gram of pure substance by one degree. The specific heat of a substance depends on its molecular structure and its phase. This scientific discovery has stimulated studies on thermodynamics, energy conversion and the work of a system.
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In physics, the definition of "work" is different from that used in everyday language. In particular, the term "work" is used when a physical force causes an object to move. In general, if an intense force moves an object very far from the starting position, the amount of work produced is large, while if the force is less intense or the object does not move very much, the amount of work produced is small.
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Have you ever wondered why skydivers reach maximum speed the moment they fall, even though the force of gravity in a fluid causes an object to accelerate continuously? A falling object will reach a constant speed when there is a holding force, such as air resistance.
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The term "inductance" can refer to "mutual induction", that is when an electric circuit generates voltage as a result of the current variation in another circuit, or to "self-induction", that is when the electric circuit generates voltage as a result of the variation of current flowing in it.
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The weight of an object is the force of gravity exerted on that object. There mass of an object is the quantity of matter of which it is made. The mass does not change, no matter where the object is and regardless of the force of gravity.
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In physics, displacement indicates the change in position of an object. When you calculate it, you measure how far a body is "out of place" from its starting position. The formula used to calculate the displacement depends on the data provided by the problem.
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Do you want to learn how to calculate a resistor in series, in parallel, or a resistor network in series and in parallel? If you don't want to blow your circuit board, you better learn! This article will show you how to do it in simple steps.
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To some lucky individuals, being good at physics comes naturally. For others, getting good grades in physics takes a lot of work. Fortunately, by acquiring fundamental skills and with a lot of practice, virtually anyone can be successful. Even more than to get good grades, understanding physics can open up knowledge of the mysterious forces that govern the functioning of the world.
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Acceleration is the change in speed of a moving object. If an object is moving at a constant speed, there is no acceleration; the latter occurs only when the speed of the object varies. If the speed variation is constant, the object moves with constant acceleration.
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To pass a physics exam you need to be careful in class and study this subject regularly, so that you understand well the fundamental concepts that you have been taught. To do this, you can use various study methods together with your peers, which will help you consolidate your knowledge.
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Do you have a physics problem and don't know where to start? Here is a very simple and logical process for solving any physics problem. Steps Step 1. Stay calm It's just a problem, not the end of the world! Step 2. Read the problem carefully a first time If it is a long problem, break it down into parts to read and understand individually until you have an overall idea.
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In one of the revolutionary scientific articles published by Albert Einstein in 1905, the formula E = mc was presented 2 , where "E" stands for energy, "m" for mass and "c" for the speed of light in vacuum. Since then E = mc 2 has become one of the most famous equations in the world.
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A diode is an electronic device with two terminals that conducts electric current in one direction and blocks it in the opposite. Sometimes it can also be called a rectifier and converts alternating electricity into DC. Since the diode is essentially "
Last modified: 2025-01-24 13:01
At first glance you might believe that the light year (al) is a measure of time that takes into account the earth year. In reality it is a unit of distance measurement that uses the speed of light as a reference criterion. If you have ever told a friend that you are five minutes from their house, you have already used a time quantity to quantify a length.
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When you know the basic formulas and principles, it is not difficult to solve circuits in parallel. When two or more resistors are connected directly to the power supply, the current flow can "choose" which path to follow (just like cars do when the road splits into two parallel lanes).
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Quantum physics (also called quantum theory or quantum mechanics) is a branch of physics that describes the behavior and interaction between matter and energy at the scale of subatomic particles, photons and some materials at very low temperatures.
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There are two forms of energy related to the motion of a body: potential energy and kinetic energy. The first is that possessed by one object in relation to the position of a second object. For example, being on top of a hill will have much more potential energy available than when you are standing on your feet.
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Impedance represents the force of opposition of a circuit to the passage of alternating electricity, and is measured in ohms. To calculate it, you need to know the value of all the resistors and the impedance of all the inductors and capacitors that oppose a variable resistance to the current flow based on how this changes.
Last modified: 2025-01-24 13:01
The Fahrenheit scale is a thermodynamic temperature scale. However, some formulas and sources use the Kelvin scale, based on degrees Centigrade. Learn how to use a formula to convert measurements from Fahrenheit to Kelvin. Steps Method 1 of 3:
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A series circuit is simple to make. You have a voltage generator, and a current flowing from the positive to the negative terminal, passing through the resistors. In this article we will examine the current intensity, voltage, resistance and power of a single resistor.
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Vectors are elements that appear very frequently in solving problems related to physics. Vectors are defined with two parameters: intensity (or modulus or magnitude) and direction. The intensity represents the length of the vector, while the direction represents the direction in which it is oriented.
Last modified: 2025-01-24 13:01
If you have just completed an experiment in physics class, you need to write the report. It might seem like a difficult job, but in reality it is a fairly simple process that allows you to explain the laboratory experience and the results you have found to the teacher and to all the people who are interested in reading the document.
Last modified: 2025-01-24 13:01
The kilogram is a unit of mass, while the newton measures force. The latter is part of the derived units of the International System of Units (SI) and corresponds to kg ∙ m / s 2 . Nonetheless, the newton can be transformed into a unit of measurement called the kilogram-force;
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Heat capacity measures the amount of energy needed to raise a body's temperature by one degree. Finding the heat capacity of a material is reduced to a simple formula: just divide the heat exchanged between the body and the environment by the temperature difference, so as to obtain the energy per degree.
Last modified: 2025-01-24 13:01
The Kelvin measurement scale is a thermodynamic scale where zero indicates the point at which the molecules do not emit heat and are completely immobile. To be able to convert a measurement expressed in Kelvin to one expressed in Fahrenheit or Celsius, you can use the steps shown in this guide.
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Transformers are electrical components that connect at least two circuits together, allowing the passage of energy. Their function is to regulate the voltage of the circuits themselves, but in certain cases they can be damaged and prevent the operation of the devices connected to them.
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Transistors are semiconductor devices that, depending on the conditions, allow or not the passage of current. They are widely used as switches or amplifiers. You can test the operation of a transistor using a multimeter that has the diode test functionality.
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Torque is best defined as the tendency of a force to rotate an object around an axis, fulcrum, or pivot. Torque can be calculated using force and moment arm (the perpendicular distance from an axis to the line of action of a force) or by means of moment of inertia and angular acceleration.
Last modified: 2025-01-24 13:01
The simplest way to represent a series of connections in a circuit is a chain of elements. The elements are inserted sequentially and on the same line. There is only one path on which electrons and charges can flow. Once you have a basic idea of what a series of connections in a circuit implies, you can understand how to calculate the total current.
Last modified: 2025-01-24 13:01
An equation is usually used to find the volume of a regular object, such as a cube or sphere; for those with irregular shapes, such as a vine or a stone, a more creative approach is required. Fortunately, there is a very simple method that allows you to find the volume by looking at the water level in a graduated cylinder.
Last modified: 2025-01-24 13:01
The density of an object is defined by the ratio of its mass to its volume. The concept of density is used in various fields, from geology to physics, and in many other fields of science. The density is able to indicate, among other things, whether an object can float when immersed in water, that is, when it has a density of less than 1 gram per cubic centimeter.
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Alternating current (AC) is the most efficient way to supply electricity. However, most electronic devices need direct current (DC) to function. For this reason, AC-DC converters, from alternating to direct, can be part of the devices themselves or of their power cables.
Last modified: 2025-01-24 13:01
Latitude and longitude are used to indicate the position of a point on the earth's surface. If you know how to read them on a map, you can determine the geographic coordinates of any place. In many online maps it is possible to know the latitude and longitude of a place with one click, but sometimes it is useful to know how to do it on paper.
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Scientific notation is commonly used in chemistry and physics to represent very large or very small numbers. Converting numbers to and from scientific notation isn't as difficult as it sounds. Just follow these steps to find out how to proceed.
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Learning geography can be a daunting undertaking. Geography is a broad subject covering many different topics, and memorizing place names with little context can seem tedious and difficult. However, mastering geography can give you a great feeling that you have achieved a goal and helps you to know a lot more about the world you live in.