Magnetism and Induction
Alternating Current Used in transmission of electricity, “back and forth” motions of elections to motion energy Direct Current Used in most household devices, continuous flow Parallel Current One or more branching pathways from circuit, most modern homes are wired this way Series Circuit A network of objects in a circuit that is in a single…
Sounds and Waves
Doppler Effect The apparent shift in frequency of a source due to the motion of the source or observer is known as this concept? Wave Length The distance between any two successive points in a waveform is known as which of the following terms? Wave Speed Formula V= f x h V= Velocity f= frequency…
Density and Elasticity
Density Equation Density = Mass / Volume As a material changes phase from solid to gas, the density of the material generally changes in what way? Density decreases Elasticity How bouncy or stretchy an object is Hooke’s Law F = – k*x
Heat Transfer and Thermodynamics
Conduction Two objects to have physical contact Convection Mixing of liquids and gases Radiation Energy that may be transmitted through empty space via electromagnetic waves Four basic phases of matter Solid Liquid Gas Plasma The Latent Heat of Fusion The amount of heat to turn a solid into a liquid The Latent Heat of Vaporization…
Work and Energy
Work The change in an object’s kinetic energy Impulse A change in momentum or rather a force applied over a time Potential Energy Stored energy, regardless of how it is stored (electrically, chemically, etc.) Formula: PE= mgh Kinetic Energy The energy of an object’s external motion. Formula: KE= 1/2 (mv^2) Examples: What is the kinetic…
Centripetal force & Torque
Centripetal Force The center-pointing force is responsible for keeping objects travelling along a circular path Centrifugal Force A center-fleeing pseudo-force is often given credit for keeping objects undergoing circular motion on their circular path. What is one way to increase torque without using more force? A longer level arm Torque how a force causes a change…
Newtons Laws of Motion
Interactions -An interaction occurs between 2 and only 2 objects -An object can have any # of interactions Force: Push/ Pull Newtons 1st Law “A body at rest remains at rest and a body in uniform motion remains in motion unless acted upon by an outside force” A body’s natural state is one of constant…
Rotational Motion
ω –>(Greek lowercase omega symbol) ω = angular velocity T = 1/f Frequency How many times it goes around in a specific amount of time Period Amount of time it takes to complete one rotation Angular Velocity Speed at which an object rotates Centripetal Acceleration Center-pointing phenomenon that helps maintain circular motion
Projectile Motion
Projectile motion is a form of motion that moves along a curved path( parabola) caused by gravity. What is the maximum range for a projectile? 45 degrees Horizontal and vertical direction have nothing to do with each other when talking about projectile motion. The directions are independent. Suppose you drop a ball and throw a…
Speed and Velocity
Speed A scalar quantity that describes ‘how fast or slow’ an object is moving Distance/ Time = Speed Velocity A vector quantity that describes ‘how fast or slow’ in a given direction an object is traveling Displacement/ Time = Velocity *The sign tells you what direction you are going* Examples: An object travels 20 meters…
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Physics 110-110A 