In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Headings of this work's sections include "A Lamp on Earth" and "The Sand Betrayed. " The author praises political figures such as Abraham Lincoln and Joseph Stalin in "Let the Woodcutter Awaken" and Emiliano Zapata in "The Liberators". One section of this work describes the flora and fauna of the Pre-Colombian era, and other sections discuss mining and the Communist Party, while a section often published separately describes the poet's ascent to Incan ruins. It includes "The Earth's Name is Juan" and "The Heights of Machu Picchu. " For 10 points, name this long poem by Pablo Neruda.
Literature

The Soave equation adds an acentric factor to this statement, and the virial equation measures deviations from this law using a compressibility factor. This law derived by Benoit Clapeyron can account for density in its "dirty mop" form, and when A and B terms are added to account for the volume and interactions between particles, it is called van der Waals equation. Containing a namesake constant that is Boltzmann's constant times Avogadro's number is, for 10 points, what law usually stated as PV equals nRT
Science

On the moon, mascons are areas where this type of anomaly is present. In geophysics, its strength is related to an object's moment of inertia by MacCullagh's formula. Faye's formula gives the difference in values of this phenomenon that is induced by free-air anomalies. Models with anomalies in the strength of this phenomenon can be calculated in a formula given by Bouguer. The equipotential surface of this force which gives the (*) mean sea level is known as the geoid. The distance at which tidal forces will overcome this other force is known as the Roche limit. Isostatic equilibria are made between a balance between the lithosphere's buoyancy and this other force. For 10 points, name this force, which causes a downward acceleration of most objects equal to 9.8 meters per second squared.
Science