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125 Cards in this Set

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Accuracy
The Extent to which a measured value agrees with the standard value of a quantity.
Balance
A tool use to measure the weight of something.
Calorimeter
Device that Isolates objects to measure temperature changes due to heat flow.
Data
Resulting values collected in an experiment.
Degrees
A Unit for temperature
Dependent Variable
Thje Unchange variable in an experiment.
Frequency
Number of occurerences per unit time.
Gamma-rays
The result of accelerating charges in the nucleus of an atom.
grams
The Derivative unit of Mass in the metric system
Hypothesis
Something taken to be true for the purpose of argument or investigation; an assumption.
Independent Variable
The variable that is changed in an experiment.
Joules
The SI unit of energy , work or heat eqaul to one newton-meter.
Kilograms
The SI unit for Mass
meter Stick
A tool for measuring length totally equallign one meter.
Millimeters
The derivative unit for length.
Nanometer
A derivative unit of length equalling 1 million to the minus nine.
Pigment
A shade of color or a drop of color.
Procedure
Steps taken in the conduction of an experiment.
Range
the horizontal distance a projectile travels.
Scientific Notation
Numbers expressed in the form M*10^n
Thermometer
a tool for measuring temperature.
Heat
Quantity of energy transferred from one object to another as a result of a difference in temperature.
Heat Energy
Energy That flows as a result of changes in temperature.
Heat Transfer
The flow of heat either by conduction, convection or radiation.
Joules
the SI unit of measurement of energy; equivalent to kg-m2/s2.
Kinetic Energy
the energy of an object in motion.
Specific Heat
the heat capacity of a substance per unit mass.
Temperature
a measure of how hot or cold an object is with respect to a reference object.
Thermal Equilibrium
the state of objects in thermal contact when they no longer change each other's temperature.
Amplitude
the maximal displacement of an object in simple harmonic motion; the peak-to-peak height of a wave.
Angle of Incidence
Angle between direction of motion of waves and a line perpendicular to the surface waves are striking.
Angle of Reflection
Angle between direction of motion of waves and a line perpendicular to the surface the waves are reflected from.
Angle of refraction
ANgle between direction of motion of waves and a line perpendicular to the surface the waves have been refracted.
Bell jar
A jar used to measure a wave property.
Concave lens
a lens that causes parallel light rays to diverge.
Concave Mirror
Reflects light from its inner surface
Constructive Interference
superposition of waves resulting in a combined wave with amplitude larger than the component waves.
Convex lens
a lens that causes parallel light rays to converge.
Convex Mirror
a mirror that reflects light from its outer surface.
Destructive Interference
Superposition of waves resulting in a combined wave with zero amplitude.
Doppler effect
the change in frequency of a wave produced by a moving source. Approaching sources have a higher frequency, and retreating sources have a lower frequency.
Electromagnetic wave
Wave consisting of oscillating electric and magnetic fields that move through space at the speed of light.
Energy
the ability to do work.
Focus
the point at which light rays from a mirror or lens intersect.
Frequency
the number of complete cycles of simple harmonic motion per unit time; the reciprocal of period; the number of wave cycles passing a fixed point per unit time.
hertz
the SI unit of measurement of frequency; equivalent to s-1.
Image
Reoroduction of object formed with lenses or mirrors.
Image size
The magnitude of the image.
Incident
the first angle in a reflection.
Index of refraction
an intrinsic property of a transparent substance, which measures the speed of light in the material compared to the speed of light in a vacuum.
intensity
the amount of energy carried by a wave across a unit area in a unit time.
interference
The result of the superposition of two or more waves.
inverted
brought in towards.
law of reflection
Angle of incidence equal to angle of reflection.
law of superposition
The displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves.
lens
An optical device design to converge or diverge light.
longitufinal wave
a wave in which points on the wave move parallel to the direction of wave propagation.
medium
The material in which a wave travels.
mirror
An object that produces a reflection of its image.
node
A point that is completely undisturbed when two waves combine.
Orientation
The direction followed in the course of a trend, movement, or development.
period
the time of one complete cycle of simple harmonic motion; the time for one wave cycle to pass a fixed point.
ray diagram
a drawing of light rays used to analyze a set of optical devices, such as a lens or mirror.
real image.
an image produced in an optical device, such as a lens or mirror, that is formed by converging rays.
reflection
The reproduction of an object by a mirror.
refration
the bending of light when it passes across the boundary between two media with different indices of refraction.
sound
A production of the compression and rarefraction of matter.
snell's law
a ray of light bends in such a way that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant.
speed
The ratio of the distance travel to the time interval.
speed of light
3.0*10^8m/s in a vacuum.
speed of sound
343m/s in air.
transverse wave
a wave pulse in which points on the wave move perpendicular to the direction of wave propagation.
tuning fork
A device used to find properties of sound.
ultraviolet
the strongest rays of sunlight.
upright
An image that doesn't change its original stance.
vacuum
Open space without air resistance.
vibration
A rapid linear motion of a particle or of an elastic solid about an equilibrium position.
virtual image
an image produced in an optical device, such as a lens or mirror, that is formed by the extension of diverging rays.
wavelength
the distance between identical points in a wave cycle.
charge
a property of attraction which either holds particles together or keep them apart.
charge distribution
The sharing of charges either by conduction or induction.
charged particle
A particle that has either a negative or a positive charge.
electric field
Property of space around a charged object that causes forces on other charged objects.
electrostatic force
Forces produced by electric charges.
magnitude
The size of a quantity.
vectors
a quantity with magnitude and direction.
coil
A wire that electricity can flow through.
electromagnet
A device that that uses electric current to produce a concentrated magnetic field.
electromagnetic
of relating electromagnets
energy transformation.
The conversion of energy into different forms by a generator or a motor.
Induction
the process by which electromotive forces are generated in a circuit due to changes in a magnetic field.
magnet
a body having the property of attracting iron and producing a magnetic field external to itself;
magnetic field intensity
The strength of magnetic fields.
magnetic forces
forces produced by the repelling of magnets.
north pole
one end of a magnet; the end that attracts the south pole.
south pole
one end of a magnet; the end that attracts the north pole.
battery
A device that converts chemical energy to electrical energy consisting of two dissimilar conductors and electrolyte.
circuit
closed loop arrangement of elements such as capacitors, resistors, inductors, and batteries, through which electrical current flows.
current
the amount of electric charge passing a point per unit time.
dissipitate
used up or diminished in some ohter way.
electricity
the property of an object to restore its shape after deformation.
equivalent resistance
a single resistance that could replace several resistors.
induced
Man made, planted. doesn't occur naturally.
kinetic energy
the energy of an object in motion.
mechanical
Relating to, produced by, or dominated by physical forces.
Ohms
the SI unit of measurement of resistance; equivalent to V/A.
parallel plates
two plates with opposite charges.
parallel circuits
Circuits which have two or more current flow paths.
potential difference
the energy of an object due to its position or internal structure.
power
the rate of change in energy, or the rate of doing work.
resistor
a circuit element that impedes the flow of current.
solar
Of relating to the sun as in solar energy.
series circuit
elements that are connected so that they have the same electrical current conducted through them.
voltage drop
The change in the potential difference of an object.
watts
the SI unit of measurement of power; equivalent to J/s.
alpha decay
The process in which the nucleus emits an alpha particle.
atomic mass
the total number of nucleons in a nucleus.
beta decay
radioactive decay process in which an electronor positron and neutrino is emmitted from a nucleus
gamma ray emmision
A result of accelerating charges in the nucleus of an atom.
half-life
the time required for half of a radioactive sample to decay.
positron emmision
The emmision of antiparticles equivalent to electrons.
photoelectric effect
the emission of electrons by certain metals when the appropriate wavelength of light is shined on them.
radioactice decay
spontaneous change of unstable nuclei into other nuclei.
radioactive material
a material that can spontaneously split and emit particles.
wave-particle duality
The spliting of wave particles.