Geophysics (correct answers)
Equation for gravity correct answers F=G(m1m2/r^2)
what is a geoid correct answers equipotential surface: surface of equal gravitational
force. Sea surface without waves or tides
what is an ellipsoid correct answers mathematical reference ellipse of rotation
three ways to measure gravity correct answers falling mass, pendulum, spring
gravimeter
adjust gravity measurements for what 7 things correct answers variation due to latitude,
tides and drift, free air, bouguer, terrain, eotvos, isostatic
latitude corrections correct answers centrifugal force greatest at equator, radius greatest
at equator, mass greater at equator
tides and drift correction correct answers instrumental drift and relations between moon,
earth, and sun
free air correction correct answers gravity varies with elevation above the geoid
bouguer correction correct answers correction applied for excess mass between
measuring station and geoid. Density and thickness
terrain correction correct answers corrections made for topography undulation
etvous correction correct answers corrections made for the moving platform
isostatic correction correct answers correction for the general flotation equilibrium of the
lithospheric segments
define diamagnetic materials correct answers all electrons are paired. In the presence
of an applied field material is aligned in the opposite direction
define paramagnetic materials correct answers some electrons are unpaired. In the
presence of an applied field the induced field field in the material is aligned in the same
direction
Define ferrimagnetic materials correct answers sublattices are opposite. Magnetization
in the strongest direction
Define ferromagnetic materials correct answers sublattices aligned in the same
direction.
, What is the equation for magnetic force correct answers F=(m1m2)/4pir^2mu; force=
pole strengths/4pi*radius^2*magnetic permeability
what is the equation for field strength correct answers H=I/2r; field
strength=current/2radius of coils
what is the equation for magnetic intensity correct answers J=kH; magnetic
intensity=magnetic suseptibility X field strength
What are the parts of a hysteresis loop correct answers saturation point, remenant
magnetism, coercitivity, saturation point
what are the components of a magnetic field correct answers total intensity, declination,
inclination, horizontal intensity, vertical intensity
what are the three ways to conduct electrical current through rock correct answers
electronic, electrolytic, dielectric
what is the equation for current correct answers I=q/t; current=charge/time
what is the equation for current density correct answers J=I/2pir^2 ; or J=I/A; Current
density=current/area
What is the equation for Ohms law correct answers I= Delta v/R ; Current=change in
voltage/resistance
what is the equation for resistance correct answers R=row(L/A); resistance= true
resistivity * length/area
what is the equation for true resistivity correct answers row=VA/IL; true
resistivity=volts*area/current*length
what are the three resistivity survey geometries correct answers wenner, schlumberger,
dipole dipole
what does the speed of radiowave propagation depends on (GPR) correct answers
speed of light, dielectric constant, and magnetic permeability
radio waves decrease in strength as they propogate due to what correct answers
absorption, scattering, and attenuation
what is elastic strain correct answers proportional to stress applied, if stress is removed
the strain disapears (rubber band)
what is plastic strain correct answers occurs when material is stressed beyond its yield
point (clay)
Equation for gravity correct answers F=G(m1m2/r^2)
what is a geoid correct answers equipotential surface: surface of equal gravitational
force. Sea surface without waves or tides
what is an ellipsoid correct answers mathematical reference ellipse of rotation
three ways to measure gravity correct answers falling mass, pendulum, spring
gravimeter
adjust gravity measurements for what 7 things correct answers variation due to latitude,
tides and drift, free air, bouguer, terrain, eotvos, isostatic
latitude corrections correct answers centrifugal force greatest at equator, radius greatest
at equator, mass greater at equator
tides and drift correction correct answers instrumental drift and relations between moon,
earth, and sun
free air correction correct answers gravity varies with elevation above the geoid
bouguer correction correct answers correction applied for excess mass between
measuring station and geoid. Density and thickness
terrain correction correct answers corrections made for topography undulation
etvous correction correct answers corrections made for the moving platform
isostatic correction correct answers correction for the general flotation equilibrium of the
lithospheric segments
define diamagnetic materials correct answers all electrons are paired. In the presence
of an applied field material is aligned in the opposite direction
define paramagnetic materials correct answers some electrons are unpaired. In the
presence of an applied field the induced field field in the material is aligned in the same
direction
Define ferrimagnetic materials correct answers sublattices are opposite. Magnetization
in the strongest direction
Define ferromagnetic materials correct answers sublattices aligned in the same
direction.
, What is the equation for magnetic force correct answers F=(m1m2)/4pir^2mu; force=
pole strengths/4pi*radius^2*magnetic permeability
what is the equation for field strength correct answers H=I/2r; field
strength=current/2radius of coils
what is the equation for magnetic intensity correct answers J=kH; magnetic
intensity=magnetic suseptibility X field strength
What are the parts of a hysteresis loop correct answers saturation point, remenant
magnetism, coercitivity, saturation point
what are the components of a magnetic field correct answers total intensity, declination,
inclination, horizontal intensity, vertical intensity
what are the three ways to conduct electrical current through rock correct answers
electronic, electrolytic, dielectric
what is the equation for current correct answers I=q/t; current=charge/time
what is the equation for current density correct answers J=I/2pir^2 ; or J=I/A; Current
density=current/area
What is the equation for Ohms law correct answers I= Delta v/R ; Current=change in
voltage/resistance
what is the equation for resistance correct answers R=row(L/A); resistance= true
resistivity * length/area
what is the equation for true resistivity correct answers row=VA/IL; true
resistivity=volts*area/current*length
what are the three resistivity survey geometries correct answers wenner, schlumberger,
dipole dipole
what does the speed of radiowave propagation depends on (GPR) correct answers
speed of light, dielectric constant, and magnetic permeability
radio waves decrease in strength as they propogate due to what correct answers
absorption, scattering, and attenuation
what is elastic strain correct answers proportional to stress applied, if stress is removed
the strain disapears (rubber band)
what is plastic strain correct answers occurs when material is stressed beyond its yield
point (clay)
