Cant come up with any ideas for my project since my teacher wasnt
specific enough! directions say " do a presentation on a topic of
Physics based on the LATEST developments, discoveries, and/or
applications of science to modern technology. Include supporting theory
and examples."

any easy ideas will do please i have tried everything ):

gravity survey for disintegrated zone identification: geophysics.

Specific
Objectives

To determine variation in the Earth’s
gravitational field caused by different distribution of densities.

To
delineate areas with anomalous gravity

theories:

Gravity in geophysical terms is the force
due to the integrated mass of the whole earth which acts on the mechanism of
the measuring instrument.Force=gravitational
constant (G) × mass of the earth (M) × mass (m)/ (Distance between masses (R))
2

Where the gravitational constant, G=6.67×10^{-11}
Nm^{2}kg^{-2}

Force
is proportional to the mass since high density bodies will produce more gravity
anomaly than low density bodies. The effect of the geological structure over
the observed gravitational acceleration can be illustrated from the figure
shown below.

Theoretical
gravity, which ranges from about 978 000 mGal at the equator to 983 000

mGal at the poles
is calculated on the geoid before corrections are applied.
If base reoccupations are done approximately every hour, known errors such as
the earth tide are well approximated by the removal of a drift correction that
is linear with time.To
increase the accuracy of the location of stations a modern GPS. The sensitivity
of the Worden gravimeter is about ten parts per million. The small numbers
results to the sub units being used such as

milliGal
(1 mGal=10^{-3}Gal)

microGal
(1microGal=10^{-6}Gal

1
gravity unit= 1 g.u(10gu=1mgal)

May 29th, 2015

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