One way is to move the adverb:
Yang Qing discovered a method to determine longitude precisely.
Another way is to convert the adverb to an adjective:
Yang Qing discovered a precise method to determine longitude.
We use latitude and longitude to precisely describe the location of places on the surface of the Earth.
"to water the earth" is a verbal phrase- more precisely an infinitive phrase. It could be expressed as "to irrigate"
The latitude would be zero; the longitude could be anything from 180W to 180E depending on where precisely it was on the equator.
Autopsy after death is a way to precisely determine a cause of death.
There are several countries in Africa through which the equator passes. Longitude would be required to say precisely where you are.
it finds out my the length,width and size.
Geographic coordinates, such as latitude and longitude, precisely identify a location on Earth's surface.
Triple beam balance
not discovered, but produced, precisely. XePtF6+ was produced in 1962, if I'm not mistaken it's positively charged.
You could describe lines of longitude as going from side to side, but since the Earth is a sphere (or more precisely, an oblate spheroid) the lines that go from side to side still come together at the poles.
Longitude can be expressed either in degrees, minutes, and seconds, or simply degrees in decimal, depending on the degree of precision you need. Examples: 23° 27′ 30" E 23° 27.500′ E 23.45833° E
A triple-beam balance scale