units $ A atm C Cd cm Da eV g h Hz J K L m M min mmHg mol N Pa parsec s torr V W °aC °ΔC Å Ω ％ functions uncertainty() CtoKscale() moredigits() sqrt() abs() sum() tan() ln() max() min() quadp() log() avg() quadn() cos() exp() sin() FtoKscale() using in symbols °aC μ ％ ν Δ ℎνλ ΔᵣG°′ ρ ∞ ΦΨ