Topic explanation

Standard explanation

Gravity influences gases by producing variations in density and pressure with height and by strongly affecting matter inside stars.

Key points

• dp/dh = −ρg
• pV=NkT
• Hydrostatic Relation: An ideal-gas model without gravity treats a gas as spatially uniform under simple conditions. In a
• Stars: Gravity compresses stellar matter. High pressures, densities and temperatures inside stars mean tha
• Gravity modifies gas distributions and can create extreme conditions in stars.

Labelled diagram