Physics is the branch of science concerned with the nature and properties of matter and energy. It includes mechanics, heat, light, sound, electricity, magnetism, and atomic structure. For the ASVAB General Science Test, you must understand basic physics principles and apply them in simple problem-solving scenarios. This section focuses on the essential concepts, equations, and applications commonly tested.<\/span><\/p>\n Motion is the change in position of an object over time. There are a few basic terms used to describe motion:<\/span><\/p>\n Where \u0394v\\Delta v represents the change in velocity and tt is the time taken.<\/span><\/p>\n These concepts are the basis for understanding more complex systems and questions involving moving objects.<\/span><\/p>\n Sir Isaac Newton proposed three fundamental laws of motion that describe the behavior of objects.<\/span><\/p>\n These laws are widely used in practical scenarios, and questions on the ASVAB may ask you to identify which law applies to a given situation.<\/span><\/p>\n Work is done when a force is applied to an object, and the object moves in the direction of the applied force. Work is measured in joules (J). The formula is:<\/span><\/p>\n W=FdW = Fd<\/span><\/p>\n Where WW is the work done, FF is the force applied, and dd is the distance over which the force is applied.<\/span><\/p>\n If there is no movement, no work is done, even if a force is applied.<\/span><\/p>\n Energy is the ability to do work. There are many types of energy, but in mechanics, the two most important are:<\/span><\/p>\n The total mechanical energy of a system is the sum of kinetic and potential energy.<\/span><\/p>\n Power is the rate at which work is done or energy is transferred. It is measured in watts (W). The formula is:<\/span><\/p>\n P=WtP = \\frac{W}{t}<\/span><\/p>\n Where PP is power, WW is work, and tt is time. For example, lifting a heavy object quickly requires more power than lifting it slowly, even if the same amount of work is done.<\/span><\/p>\n Simple machines make work easier by changing the direction or magnitude of a force. Common types include:<\/span><\/p>\n These machines provide a mechanical advantage, which allows a smaller force to move a larger load. Mechanical advantage (MA) is the ratio of output force to input force:<\/span><\/p>\n MA=FoutFinMA = \\frac{F_{\\text{out}}}{F_{\\text{in}}}<\/span><\/p>\n Understanding simple machines and their efficiency can help you solve mechanical reasoning questions on the ASVAB.<\/span><\/p>\n A wave is a disturbance that transfers energy from one place to another without transferring matter. There are two types of waves:<\/span><\/p>\n Important wave properties include:<\/span><\/p>\n Sound is a mechanical longitudinal wave. It requires a medium such as air, water, or a solid to travel. The speed of sound varies with the medium:<\/span><\/p>\n High frequency means high pitch; low frequency means low pitch.<\/span><\/p>\n Light is an electromagnetic wave that travels fastest in a vacuum. It behaves both as a wave and a particle (called a photon). Key behaviors include:<\/span><\/p>\n Understanding how light and sound work is essential for answering questions related to vision, hearing, and energy transfer.<\/span><\/p>\n Matter is made of atoms that contain charged particles: electrons (negative) and protons (positive). When objects gain or lose electrons, they become charged:<\/span><\/p>\n Static electricity results from the accumulation of charge on an object.<\/span><\/p>\n These quantities are related by <\/span>Ohm\u2019s Law<\/b>:<\/span><\/p>\n V=IRV = IR<\/span><\/p>\n This equation is used to calculate current, voltage, or resistance in electrical circuits. For example, if a circuit has 10 volts and 2 ohms of resistance, the current is:<\/span><\/p>\n I=VR=102=5\u2009AI = \\frac{V}{R} = \\frac{10}{2} = 5\\,A<\/span><\/p>\n Electricity flows in a closed loop called a circuit. There are two main types:<\/span><\/p>\n Magnetism arises from the motion of electric charges. A current-carrying wire generates a magnetic field. Electromagnets use this principle to create controllable magnetic fields.<\/span><\/p>\n Magnets have poles: north and south. Opposite poles attract; like poles repel.<\/span><\/p>\n Understanding the basics of circuits and magnetism is helpful for questions involving household electronics or simple machinery.<\/span><\/p>\n Chemistry is the science of matter and the changes it undergoes. For the ASVAB General Science Test, chemistry questions assess your understanding of basic concepts related to atoms, elements, compounds, reactions, states of matter, and the properties of substances. This section presents a detailed review of the foundational topics in chemistry that are commonly covered in the test.<\/span><\/p>\n All matter is composed of atoms, which are the smallest units that retain the properties of an element. An atom consists of three primary subatomic particles:<\/span><\/p>\n The number of protons in an atom determines its atomic number and defines the element. For example, any atom with one proton is hydrogen, while any atom with six protons is carbon.<\/span><\/p>\n The mass of an atom is concentrated in the nucleus, as protons and neutrons are much heavier than electrons. The atomic mass is the sum of protons and neutrons.<\/span><\/p>\n Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. For example, carbon-12 and carbon-14 are both isotopes of carbon, but carbon-14 has two additional neutrons. Isotopes of some elements are unstable and undergo radioactive decay, releasing energy in the process.<\/span><\/p>\n The periodic table is a chart that organizes elements by increasing atomic number and groups them based on similar chemical properties.<\/span><\/p>\n Key groups include:<\/span><\/p>\n The periodic table helps predict an element\u2019s reactivity, state of matter, and bonding behavior.<\/span><\/p>\n Atoms form chemical bonds to achieve stable electron configurations, typically aiming for a full outer shell of electrons.<\/span><\/p>\n Understanding how atoms bond helps you interpret formulas and predict compound behavior.<\/span><\/p>\n A chemical reaction involves the transformation of reactants into products. Atoms are rearranged, but the number of each type of atom remains the same.<\/span><\/p>\nUnderstanding Motion and Forces<\/b><\/h3>\n
Distance, Displacement, Speed, and Velocity<\/b><\/h4>\n
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\n<\/span> Speed=DistanceTimeors=dt\\text{Speed} = \\frac{\\text{Distance}}{\\text{Time}} \\quad \\text{or} \\quad s = \\frac{d}{t}<\/span><\/li>\n
\n<\/span> Velocity=DisplacementTimeorv=\u0394dt\\text{Velocity} = \\frac{\\text{Displacement}}{\\text{Time}} \\quad \\text{or} \\quad v = \\frac{\\Delta d}{t}<\/span><\/li>\n
\n<\/span> a=\u0394vta = \\frac{\\Delta v}{t}<\/span><\/li>\n<\/ul>\nNewton\u2019s Three Laws of Motion<\/b><\/h4>\n
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\n<\/span> An object at rest remains at rest, and an object in motion continues in motion at a constant velocity unless acted upon by a net external force. This law explains why seat belts are important\u2014without them, your body would continue moving forward in a car crash.<\/span><\/li>\n
\n<\/span> Newton’s second law shows how the velocity of an object changes when it is subjected to an external force. The formula is:<\/span>
\n<\/span> F=maF = ma<\/span>
\n<\/span> Where FF is the force applied, mm is the mass of the object, and aa is the acceleration.<\/span><\/li>\n
\n<\/span> For every action, there is an equal and opposite reaction. This explains phenomena like how rockets launch by pushing exhaust gases downward to lift themselves upward.<\/span><\/li>\n<\/ol>\nEnergy, Work, and Power<\/b><\/h3>\n
Work<\/b><\/h4>\n
Energy<\/b><\/h4>\n
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\n<\/span> KE=12mv2KE = \\frac{1}{2}mv^2<\/span>
\n<\/span> Where mm is mass and vv is velocity.<\/span><\/li>\n
\n<\/span> PE=mghPE = mgh<\/span>
\n<\/span> Where mm is mass, gg is gravitational acceleration (about 9.8 m\/s\u00b2), and hh is the height above the ground.<\/span><\/li>\n<\/ul>\nPower<\/b><\/h4>\n
Simple Machines and Mechanical Advantage<\/b><\/h3>\n
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Waves, Sound, and Light<\/b><\/h3>\n
Wave Properties<\/b><\/h4>\n
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\n<\/span> v=f\u03bbv = f\\lambda<\/span><\/li>\n<\/ul>\nSound Waves<\/b><\/h4>\n
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Light Waves<\/b><\/h4>\n
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Electricity and Magnetism<\/b><\/h3>\n
Electric Charge and Static Electricity<\/b><\/h4>\n
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Current, Voltage, and Resistance<\/b><\/h4>\n
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Circuits and Magnetism<\/b><\/h4>\n
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Chemistry Concepts for the ASVAB General Science Test<\/b><\/h2>\n
Atomic Structure and the Periodic Table<\/b><\/h3>\n
Structure of an Atom<\/b><\/h4>\n
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Isotopes<\/b><\/h4>\n
The Periodic Table<\/b><\/h4>\n
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Chemical Bonds and Reactions<\/b><\/h3>\n
Types of Chemical Bonds<\/b><\/h4>\n
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Chemical Reactions<\/b><\/h4>\n