Physics Midterm Flashcards

Terms Definitions
cos90°
0
Centi
c -2
Magnetic Flux
Weber (Wb)
Parallel
1/R= 1/R1 + 1/R2
 
 
Units of charge (q)
Coulomb (C)
Ultrasound is a .......... wave.
Which ...... be heard by humans.
sound
can't
__________ are always attractive.
gravitational forces
Displacement
A vector quantity describing the straight line distance between an initial and a final position of some particle or object
Protective layer of gelatin that provides sturdiness to unexposed radiographic film
Supercoat-Overcoat
Magnitude ---> Components
X: Mcos(), Y: Msin()
Shallow image depth= ___ frame rate?
High
Mass
Describes the inertial property of bodies and is defined as the quantity measure's of inertia
Hyades alpha star is
Aldebaran; M.S. type K
greater resistance with...
1. longer, thinner, higher temps
angular velocity
angular displacement of object divided by the time needed to make the displacement
Colloid
Particles are suspended but they can reflect light
 
ex. jello, pudding, mayo, smog/fog
average acceleration
change in object's velocity during time interval, divided by the time interval
True or false. In radiography, the only quality control testing that is done daily is processor quality control.
True
voltage ripple
full wave= 100%
3 phase, 6 pulse=13%
high frequency= >1%
hard often brittle materials like carbon
covalent crystals
Pressure
the force acting per unit area Pa
diffuse
the random scattering of light rays at diffrent angles when a beam of light is reflected off a rough surface.
simple harmonic motion
motion that resultsif force that restores objects equilibrium is directly proprtional to the displactement of the object
Planck
Formulated the energy of a photon by creating incandescence light.
What is the equation for speed?
Distance Travled/Time elapsed
Two charged particles held close to each other are released. As they move, the acceleration decreases. Therefore, the particles have what kind of charges?
like charges
Compared to its weight on Earth, a 10-kg object on the moon will weigh
less
Compared to its weight on Earth, a 10-kg object on the moon will weigh
Chapter 4
Concentration of energy in a sound beam? Units?
Intensity. w/cm^2
What does increasing the temperature of a system do to its entropy?
It increases it.
Isomers
two or more nuclides with same atomic number, same mass numbers. Different value of energy content. Always belong to same element
conduction
the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts
Loop-Wire Magnetic Field
The magnetic field produced at the center of a circular loop of current-carrying wire with a radius of r, calculated by the equation: B = u0i/2r
What is astronomy?
Astronomy is the study of the galaxies, stars, planets, asteroids, comets, and all the other objects that can and sometimes cannot be seen in the universe.
Viscosity Flowing w/ Liquids
High Viscosity- low flow, thick
Low Viscostiy- high flow, thin
Equal Forces
Equillibrium -- sum of the forces add to zero
Condensation occurs when matter changes from a
gas to a liquid
Condensation occurs when matter changes from a
Chapter 23 Change of phase
What is the SPTA intensity limit for unfocused US?
100mW/cm squared
Rechargedable Nickel
Cadmium or NiCad cell used in battery powered mobile x-ray units
base unit
one of the units, as mass, length, time, or electric current, taken as a basis for a system of units in the sciences
kirchhoff's laws
at any junction the sum of currents in will equal the sum of currents out --- conservation of electric charge
Dark Matter
Matter we can't see that tugs on stars and galaxies that we can see.
Normal force –
a force that is perpendicular to the surface plane.
What creates a shallow focus: ___ diameter, ___ frequency?
Small diameter, low frequency
newton law of motion
any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body
Radius Luminosity--Temperature Relationship
to truly know the brightness of a star you need to know size and temp
In general, the tail of a comet streams away from the comet in a direction...
away from the Sun
600 mA @ 200 ms = mAs
600mA x 0.2s=120 _______ mAs
gravitational field strength
the force felt by a 1.0 kg mass when place at a certain location in a gravitational field, vector quantity (direction is to the center of the celestial body causing the field), symbol g, at surface of earth g=9.8 N/kg
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
Typically temperature scales are based on...
Both the boiling and freezing points of water
The acceleration produced by a net force on an object is
inversely proportional to the mass of the object, directly proportional to the magnitude of the net force, in the same direction as the net force
The acceleration produced by a net force on an object is
Chapter 5 Newton's Second Law of Motion- Force and Acceleration
What happens if you put a small compass in a mgnetic feild?
makes parallel lines to magnetic feild lines
one dalton is equal to what
1/12th of the mass of one atom of carbon 12
Two children with masses of 21 and 43 kg are sitting on a balanced seesaw. If the lighter child is sitting 3 m from the center, where is the heavier child sitting?
1.46 m from the center(set up a ratio)
Kelvin
=C+273
minuscule
very small.
all electrons paired
diamagnetic
constant speed
Ff = F||
Classification
A system of organizing data
Destructive interference takes place with _______________ waves.
Out-of-phase
formula of force
mass times acceleration
Tarsiers
large tarsal bones, eat meat, nocturnal
heat radiation
charging atoms to become electromagnetically charged for heat transfer
Electrical forces between charges are normally strongest when the charges are close/far apart?
close
Convention
Thermal energy transfer between two points due to a bulk of matter. E.g hot fluid expands, gets less dense, rises, and creates a current. (can only take place in fluids or gasses).
cheetah
a cat, Acinonyx jubatus, of southwestern Asia and Africa, resembling a leopard but having certain doglike characteristics, often trained for hunting deer, antelope, etc.: an endangered species.
solar flare
a sudden eruption of intense high-energy radiation from the sun's surface
machine
a device that conserves energy or helps us do work
Scaler
A quantity where direction is not important
Highest albedo of any solar system object
Enceladus
compound
chemical substance made of atoms of two or more different elements combined in a fixed proportion
Accuracy
An accurate measurement is one which is close to the true value. Repeating the experiment usually helps to get closer to the true value.
acceleration
the act of accelerating; increase of speed or velocity.
radians
the measure of a central angle subtending an arc equal in length to the radius: equal to 57.2958°.
Fundamental Frequency
The lowest frequency that a standing wave can support, given by the equation f=nv/2L for strings fixed at both ends and pipes open at both ends and f=nv/4L for pipes closed at one end, where n=1; first harmonic
What are the sensory regions of the skin served by a particular spinal nerve called?
Dermatomes
Electric field
"aura" around any charge, its ability to exert force
 
measures their ability to exert force on other charges  
A certain ocean wave has a frequency of 0.05Hz and a wavelength of 10 meters. What is the wave's speed?
5m/s
One Partial pressure is the total pressure times the fractional concentration
Dalton's Law
Which law describes the physics of refraction?
Snell's Law
A convenient aid for visualizing electric field patterns is to draw lines pointing in the direction of the field vector at any point.
electric field lines
tennis
a game played on a rectangular court by two players or two pairs of players equipped with rackets, in which a ball is driven back and forth over a low net that divides the court in half.
acceleration (vector; m/s2)
the rate of change of velocity.
Translational Equilibrium
State where the sum of the forces acting on an object is zero, giving it no net acceleration
What is gamma radiation used for?
-medical imaging-Cancer treatment-a form of nuclear radiation
A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.6 N acts on it for a distance of 0.4 m?
.24 J
Monochromatic light refers to light that is what?
of only one color
The distance between successive identical parts of wave is called its
wavelength
The distance between successive identical parts of wave is called its
Chapter 25 Vibrations and Waves
work
The product of the force on an object and the distance through which the object is moved (when force is constant and motion is in a straight line in the direction of the force); measured in Joules
Archimedes's Principle
The buoyant force on an object imersed in a fluid is equal to the weight of the fluid displaced by the object.
What is the voltage generated by a standard zinc carbon AAA battery?
1.5 volts
kepler's first law
the paths of the planets are ellipse with the sun at one focus
Newton’s 1st Law
Every object continues in a state of rest or uniform motion in a straight line unless acted upon by an external force.
Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the
second law of thermodynamics
Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the
Chapter 24 Thermodynamics
power
is the time rate at which work is done or energy is transferred. In calculus terms, power is the derivative of work with respect to time. The SI unit of power is the watt (W) or joule per second (J/s). Horsepower is a unit of power in the British system of measurement.
joule
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
x-rays convert to light- 99% comes from:1% comes from:
light conversion 99%from direct interaction b/w x-rays and film.
Newton’s first law –
an object at rest will remain at rest, and an object in motion with constant speed will remain at constant speed unless acted on by an external unbalanced force (if ΣF = 0, then V = Constant).
What is pressure?
Force per unit area (P = force / area)
How much time does it take for most brain cells to die with loss of blood flow?
3 to 4 minutes
At what part of a path does a projectile have minimum speed?
At the top of its path
At what part of a path does a projectile have minimum speed?
Chapter 3 Projectile Motion
A very massive object A and a less massive object B move toward each other under the influence of mutual gravitation. Which force is greater?
Both forces are the same
The amount of heat required to change the temperature of a unit mass of a substance by 1 degree is its specific heat capacity
True
The amount of heat required to change the temperature of a unit mass of a substance by 1 degree is its specific heat capacity
Chapter 21 Temperature, Heat, and Expansion
What forces are acted upon a stationary ball on a table?
Gravity is pulling the ball down. The table is pushing the ball up. The forces are equal and opposite
What is an example of conduction?
a metal rod that is placed in a flame - the one end heats up and the other end also becomes warm due to conduction
If, after a few years, your films are turning yellow in color, it is probably because:
The fixer was not removed during the wash cycle
/ 114
Term:
Definition:
Definition:

Leave a Comment ({[ getComments().length ]})

Comments ({[ getComments().length ]})

{[comment.username]}

{[ comment.comment ]}

View All {[ getComments().length ]} Comments
Ask a homework question - tutors are online