Physics Vocab Flashcards

Terms Definitions
T 12
Electric Potentital
Volt v
another word for speed
Units of power
Watts = J/s
average acceleration
change in velocity/time taken
Magnetic _____________________ is the angular difference between magnetic north and geographic north
A ubiquitous attractive force existing between any two objects, whose magnitude is directly proportional to the product of the two masses observed and inversely proportional to the square of their distance from each other
Calcium tungstate- __% conversion efficiencyRare Earths-__% conversion efficiency
5%, 15-20%
an alternative unit to measure pressure
During reception, a transducer converts ___ energy into ___ energy
Acoustic, electrical
Positively charged central region of an atom made up of protons and neutrons, and containing most the mass of an atom
Emitted freq is
rate at which source vibrates
higher harmonics have ___ wavelengths and ___ frequencies
shorter, higher
gravitational force
attractive force between 2 objects that is directly proportional to the mass of the objects
Location. Defines the distance and direction between two points.
All magnifying glasses under water will _____________.
magnify less
Tube angle indicators must be accurate within _____:
radiograpic technique charts are based on the
sthenic patient
uniform throughout in structure or makeup (sugar in water)
homogenous materials
a ferroalloy containing up to 80 percent aluminum.
Impact refers to a _____ and is measured in ________.
a point on the wave of zero disturbance
Current from a battery is always what?
direct current
Which cooks faster in boiling oil
A sliced potato
Which cooks faster in boiling oil
Chapter 18 Solids
Reducing the total range of signals is what?
Systematic Error
Systematic errors affect all of your results. You cannot making up for them by taking lots of results. All the readings are shifted one way or another from the true value.
Force which a moving body has because of it's mass and motion
Virtual Image
An image produced at a point where light does not actually pass or converge. For mirrors, this would be on the opposite side of the object; for lenses, it would be on the same side as the object
derived unit
any unit that is not fundamental and is a combination of kilograms, meters and/or seconds (m/s)
Pure Substance
A substance of matter that has a definite chemical & physical property (one substance only)
What is physics?
A science that studies the natural world.
Evaporation is a cooling process and condensation is
a warming process
Evaporation is a cooling process and condensation is
Chapter 23 Change of phase
Define period.
Length of time it takes to complete one cycle
Alkaline Type
Dry Cell that consist of a manganese dioxide rod immersed in an alkaline potassium hydroxide paste contained in a cylinder
the ability of a substance to flow; a measure of this ability, the reciprocal of the coefficient of viscosity
SHM: PE is a maximum at
the point of maximum displacement
Electrically Polarized
Term applied to an atom or molecule in which the charges are aligned so that one side has a slight excess of positive charge and the other side a slight excess of negative charge.
Newton’s third law –
every action must produce an equal but oppositely directed reaction (F on A by B = -F on B by A).
How do you get rid of an artifact?
Change the view
a unit of energy, the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force
Newton's 3rd Law
for every action there is a equal but opposite reaction
How is a technologically advanced civilization characterized in the Drake equation?
A civilization that can communicate over interstellar distances
what are the four primary exposure factors
kvp, ma, time, and sid
law of universal gravitation(section 3)
the force of gravity acts between all objects in the universe
When an object is forced to vibrate at its natural frequency, resonance occurs
When an object is forced to vibrate at its natural frequency, resonance occurs
Chapter 26 Sound Waves
The nuclear fusion process in the Sun...
Converts hydrogen into helium and releases energy
Lobsters live on the bottom of the ocean. The density of a lobster is
greater than the density of seawater
Lobsters live on the bottom of the ocean. The density of a lobster is
Chapter 19 Liquids
a lightbulb is connected to a 120V, 60Hz source. How many times per second does the current reverse direction?
60Hz = 60 oscillations/s ... 1 oscillation reverses twice (sin curve)+120= 60 times-120 = 60 times120 times/sec
what is the gravity on the earth's surface
9.8 m/s (sq) meteric
32 ft/s (sq) english
What are the three kinematic equations?
Delta X = Vot + 1/2 at^2Vf = Vo + atVf^2 = Vo^2 + 2a Delta X
ρ = m/V
Michael Faraday
Invented field lines
SI unit of power
wiggle in space and time
The gravitational attraction between two bodies depends on the distance, r, between them. The attraction varies with the distance as...
a quantum of electromagnetic radiation, usually considered as an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of one.
peak of energy (Oil)
2025 prediction global
Unlike Charges______, while like charges______.
Attract, Repel
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is:
What kind of quantity is work?
not logical; contrary to or disregardful of the rules of logic; unreasoning:
What horn is responsible for sensory function?
Is glass transparent to either infared or ultavoilet light?
Negative Acc
Moving towards (-) speeding up (+)Moving away (+) slowing down (-)
What is the hydrostatic pressure of the heart when a patient is standing?
_________ states that the electric flux through any closed surface is equal to the net charge Q inside the surface divided by the permittivity of free space.
Gauss' Law
strength or power exerted upon an object; physical coercion; violence:
static friction
friction that resists an object's beginning motion.
Laminar Flow
The simplest type of liquid flow through a tube where thin layers of liquid slide over one another, occurring as long as the flow rate remains below a critical velocity Vc
controlled expirament
testing one variable at a time; usually involves an expiramental group and control group.
In which part of the tube does thermionic emission occur?
A measure of the disorder of a system.
First orbited by Borman, Lovell, and Anders in 1968
the Moon
The stage of the manufacturing process in which colored dyes are added to match the wavelengths of light photons is the:
mixing stage
What type of a wave is sound?
Longitudinal, mechanical
the time required for one half the atoms of a given amount of a radioactive substance to disintegrate
the bending of light when it passes across the boundary between two media with different indices of refraction.
Uniform motion
the motion of an object moving at constant speed
How far out is the Milky Way?
30,000 years out
a vector that results from the sum of two other vectors; it always points from the first vector’s tail to the last vecto's tip
A star that is responsible for causing a nebula to fluoresce (i.e. emit an emission spectrum) is mostly likely a star of type...
O or B
If you subtract the OID from the SID, the result is:
a grid is constructed with ____ strips and _______ interspace material
radiopaque, radiolucent
what type of magnets are produced by nature
natural magnets
ray diagram
a drawing of light rays used to analyze a set of optical devices, such as a lens or mirror.
Newton's Third Law
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Define frequency.
The number of cycles that occur in one second.
Units: hertz (Hz) "per second"
Bronco the skydiver falls toward Earth. The attraction of Earth on Bronco pulls him down. The reaction to this force is
Bronco pulling up on Earth
Bronco the skydiver falls toward Earth. The attraction of Earth on Bronco pulls him down. The reaction to this force is
Chapter 6 Newton's Third Law of Motion
Uniform Circular Motion 2
Always a radial accel. towards the inside of the circle.
capacitance (scalar; F)
a measure of how much charge a capacitor can store.
atomic mass unit
a unit of measurement for the mass of particles in atoms
Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles per hour has
twice as much momentum
Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles per hour has
Chapter 7 Momentum
What is the pressure of the most faintly heard sound?
2 x 10^(-5) Pa
Which has more mass a kg of feathers or a kg of iron
both have the same
What does TIB stand for?
Thermal index assuming bone is at the beam's focus

Tissue anywhere in the Doppler beam is exposed
 to ultrasound, Tissue anywhere in the imaging plane is exposed
to ultrasound, Doppler intensities are higher than for continuous
wave fetal monitoring.

Which of the following are correct for a duplex,
pulsed wave Doppler instrument? 
Does amplitude remain constant as the sound wave travels through a medium?
No, it becomes attenuated as it undergoes various processes (reflection, refraction, or absoprtion)
List 3 factors that would speed up a chemical reaction.
-Catalyst, higher pressure, and higher temperature.
What is the rule when multiplying and dividing with Sig. Dig.'s?
When you multiply you are only allowed to keep the smallest # of sig. dig.'s present in one of the numbers being multiplied or divided.
A car is moving at 90 km/h and it rounds a corner, also at 90 km/h. Which is true? 
The car is accelerating and the car moves at constant velocity
power equation
Speed is never
How is Ozone destroyed?
c, 10 to the -2
magenta and yellow make
light red
Which provides better spatial resolution: a 1000x1000 display or a 512x512 display?
Early names of pulsars are
LGM1, LGM2...
a close agreement by competent observers of a series of observations of the same phenomena (event in nature)
quantities, such as temperature or distance, that are just numbers without any direction
The unit of work is the:
instrument used to indicate the presence, strength, and direction of very small currents in a circuit
Boltzmann's constant
a fundamental constant, usually encountered in thermodynamics, with a value of 1.38×10-23 J/K.
Species used in a cladistic analysis that are closely related to the species being studied and are used to differentiate between shared derived and ancestral derived features
the study of how motion occurs, including distance, displacement, speed, velocity, acceleration, and time
A pathology that is difficult to penetrate is called a/an ____ condition
John Dalton
a brilliant school teacher who published the Atomic Theory
Even a steel bridge can collapse because of resonance
Even a steel bridge can collapse because of resonance
Chapter 26 Sound Waves
term applied to a physical quantity such as momentum, energy, or electric charge, that remains unchanged during interactions.
(kWh) Energy unit, the amount of energy equal to 1000 watts delivered continuously for one hour (3600 seconds)
occurring, done, or completed in an instant:
Nearby star with largest known proper motion
Barnard's Star
Peak Oil
-Oil gift frm nature-1859 first had oil (PA)-took millions of yrs. to produce-takes time to go frm. high concentration to low concentration (pipe)-peak curve (13/64)-geological aspect: we are @ midway pt.
mechanical advantage
ratio of resistance force to effort force
If a free falling object were equipt with a speedometer, its speed reading would increase by about ___ seconds
chemical change
a change in which the substance becomes an entirely different substance
chemical changes are not reversible
The ratio of useful work output to total work input is called the:
bending of light that passes around an obstacle or through a norrow slit
the tech must acoind the errrors of using a ________ grid either of focus or upside down
the reaction force that provides an outward pull on the axis
centrifugal force
cosmic ray
a radiation of high penetrating power that originates in outer space and consists partly of high-energy atomic nuclei
Great red spot
great blemish on the surface of Jupiter caused by a giant storm.
uniform circular motion
motion at constant speed around a circle with a fixed radius
As more lamps are put into a parallel circuit, the overall current in the circuit
Define focal zone.
the region or zone surrounding the focus, where the beam is narrow and image is relatively good
Static Friction –
A force that exist between two surfaces while motion is impending.
What is the main advantage of pulsed wave doppler?
Range specificity
When no net motion of charge occurs within a conductor, the conductor is said to be in _______.
electrostatic equilibrium
to discover or catch (a person) in the performance of some act:
Heat of Transformation
The amount of heat required to change the phase of a substance, calculated by the equation q = mL, where q is heat, m is the mass of the substance, and L is the heat of transformation for that substance
The speed of a sound wave depends on
The air temperature
If you view a hot spectrum through a cloud of gas, what sort of spectrum are you likely to see?
absorption spectrum
angle of incidence
angle between an incident ray and the normal to the surface it encounters
Severity Of Electric Shock
primarily determined by the amount of current and the area of the body that is involved
diverging lens (concaue lens)
bends light so it spreads light apart instead of coming together
What are the 3 basic modes of display, or formats, are important in viewing ultrasound information?
Amplitude mode
Brightness mode
Motion mode
When a focal spot grows to an unacceptable size, which action must be taken?
Tube must be replaced
moment of inertia (scalar; kg-m2)
the intrinsic property of an object that causes it to resist changes in rotational motion.
line of best fit
line drawn as close to all data points as possible; models predictions
What makes a process irreversible?
It happens so quickly that it cannot be reversed - most processes are irreversible.
If the acceleration of an object with constant mass doubles, what else has doubled?
the force acting on the mass
All of the elements in Group B (all Metals)
Transitional Elements (all metals) which have 1 or 2 valence electrons
What is the frequency for a tube closed at both ends?
frequency = nv/4L where n = 1,3,5...
What is the difference between heat and temperature?
Heat is a measure of the total kinetic energy contained in a body, whereas temperature is a measure of the average kinetic energy
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