The epicenter of an earthquake can be located using from at least three seismographic stations.

The epicenter of an earthquake can be located using triangulation from at least three seismographic stations.

It is the location directly above it on the surface of the earth. In about 75% of earthquakes, the focus is in the top 10 to 15 kilometers of the crust.

In order to determine the epicenter of the earthquake we use a method called triangulation. In triangulation, the distance of the earthquake to the station is determined from a seismogram at a seismograph station. This distance is used as the radius to plot a circle.

Find more information about Epicenter of earthquake here:

link

Explanation:

The epicenter of an earthquake is a point on the earth surface which is directly above the focus.

To determine the epicenter of the earthquake we use a method called triangulation. In triangulation, the distance of the earthquake to the station is determined from a seismogram at a seismograph station. This distance is used as the radius to plot a circle. We do this for three places. Where they intersect marks the epicenter of the earthquake.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

it takes on an electronical energy