Question

define the following

focus
epicenter
seismograph
richterscale

PLEASE ANSWER ME ​

Answer 1

Answer:

Focus = In physics, a focus is “a point at which rays of light, heat, or other radiation meet after being refracted or reflected.” Perhaps you can imagine how a fireplace or a hearth—contained areas and sources of heat and light—was likened to such a point in math and science.

Epicenter = the central point of something, typically a difficult or unpleasant situation.

Seismograph = an instrument that measures and records details of earthquakes, such as force and duration.

Richter scale = a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. The more destructive earthquakes typically have magnitudes between about 5.5 and 8.9; it is a logarithmic scale and a difference of one represents an approximate thirtyfold difference in magnitude.