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51 Cards in this Set
- Front
- Back
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Conduction
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transfer of thermal energy with no over all tranfer of matter
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Thermodynamic
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study of thermal and other forms of energy
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4 strokes of a piston
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intake, compression, power, exaust
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How is temperature related to the average kintetic energy of the particles in an object?
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temperature is related to the average kinetic energy of particles in an object due to their random motion through space
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Specific Heat
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C
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time
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seconds
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distance
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m
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accelaration
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meters/seconds squared
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newtons
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kg x meters/second
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joules
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N x M
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velocity
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m/s
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First law of thermal dynamics
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energy is conserved
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2nd law of thermal dynamics
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thermal energy can flow spontaneously from cold objects to hot objects only is work is done on the system
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3rd law of thermodynamics
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absolute zero cannot be reached
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kinetic energy
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the energy of a moving object
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potential energy
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stored up energy of an object
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conservation of energy
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energy cannot be created nor destroyed
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where does the kinetic energy of a car go when you step on the break
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some of it is lost due to friction
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machine
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a device that changes a force
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mechanical advantage
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the number of times that the machine increases an input force
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work(deff)
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the product of force and distance
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work
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for a force to do work on an object, some of the force must act in the same direction as the object moves. if there is no movement, no work is done
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power(deff)
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doing work at a faster rate requires more power. to increase power you can increase the amount of work done in a given time, or you can do a given amount of work in less time
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force
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A Push or pull that acts on an object
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weight
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force of gravity acting on an object
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newtons second law
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acceleration of an object is equal to the net force acting on it divided by the object's mass
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mewtons third law
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whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object
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NEWTONS FIRST LAW
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the motion of an object does not change as long as the net force acting on the object is zero
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inertia
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the tendany of an object to resist change in motion
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mass
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a measure of how much matter is in an object
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lever
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a ridge bar that is free to move around a fixed point
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falcrum
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the fixed point the bar rotates around
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chemical energy
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the energy stored in chemical bonds.
example, fire |
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thermal energy
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the total potential and kinetic energy of all the microscopic particles
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energy conversion
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energy can be converted from one form to another
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einstein's equation
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energy and mass are equivalent and can be converted into eachother
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conserving energy resources
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energy resources can be conserved by reducing energy needs and by the efficiency of energy use
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temperature
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the measure of how cold or hot an object is compared to its reference point
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heat
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transfer of thermal energy from one object to another because of temperature difference
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thermal expansion
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increase of volume of a material due to a temperature increase
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specific heat(deff)
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the amount of heat needed to raise the temperature of one gram of a material by one degree Celcius.
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specific heat
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the lower a material's specific heat, the more its temperature increases when heat is absorbed
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mechanical wave(deff)
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disturbance in matter that carries energy from one place to another
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medim
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the material through which a wave travels
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mechanical wave
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a mechanical wave is created when a sorce of energy causes a vibration to travel through a medium
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types of mechanical waves
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the three types of mechanical waves are transverse, longitudinal, ans surface
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crest
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the highest point of the wave above the rest poition
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trough
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lowest point below the rest poition
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transeverse wave
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a wave that causes the medium to vibrate at right angles to the direction in which it travels
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longitudinal
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a wave in which the vibration of the medium is parallel the direction in which the travels
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surface wave
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a wave that travels along a surface sparating two media
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