From dd662ac39be68f8d305989be6cd9550879668a5c Mon Sep 17 00:00:00 2001
From: Adrien Hopkins <masterofnumbers17@gmail.com>
Date: Fri, 8 Nov 2019 11:59:36 -0500
Subject: Added imperial units to BritishImperial and USCustomary.

---
 src/org/unitConverter/unit/SI.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/org/unitConverter/unit/SI.java')

diff --git a/src/org/unitConverter/unit/SI.java b/src/org/unitConverter/unit/SI.java
index f623179..45a81e2 100644
--- a/src/org/unitConverter/unit/SI.java
+++ b/src/org/unitConverter/unit/SI.java
@@ -72,6 +72,16 @@ public final class SI {
 		}
 	}
 
+	/**
+	 * Constants that relate to the SI or other systems.
+	 * 
+	 * @author Adrien Hopkins
+	 * @since 2019-11-08
+	 */
+	public static final class Constants {
+		public static final LinearUnit EARTH_GRAVITY = METRE.dividedBy(SECOND).dividedBy(SECOND).times(9.80665);
+	}
+
 	// dimensions used in the SI, as ObjectProducts
 	public static final class Dimensions {
 		public static final ObjectProduct<BaseDimension> EMPTY = ObjectProduct.empty();
@@ -165,12 +175,19 @@ public final class SI {
 	public static final LinearUnit SIEVERT = JOULE.dividedBy(KILOGRAM); // for dose equivalent
 	public static final LinearUnit KATAL = MOLE.dividedBy(SECOND);
 
+	// common derived units included for convenience
+	public static final LinearUnit GRAM = KILOGRAM.dividedBy(1000);
+	public static final LinearUnit SQUARE_METRE = METRE.toExponent(2);
+	public static final LinearUnit CUBIC_METRE = METRE.toExponent(3);
+	public static final LinearUnit METRE_PER_SECOND = METRE.dividedBy(SECOND);
+
 	// Non-SI units included for convenience
 	public static final Unit CELSIUS = Unit.fromConversionFunctions(KELVIN.getBase(), tempK -> tempK - 273.15,
 			tempC -> tempC + 273.15);
 	public static final LinearUnit MINUTE = SECOND.times(60);
 	public static final LinearUnit HOUR = MINUTE.times(60);
 	public static final LinearUnit DAY = HOUR.times(60);
+	public static final LinearUnit KILOMETRE_PER_HOUR = METRE.times(1000).dividedBy(HOUR);
 	public static final LinearUnit DEGREE = RADIAN.times(360 / (2 * Math.PI));
 	public static final LinearUnit ARCMINUTE = DEGREE.dividedBy(60);
 	public static final LinearUnit ARCSECOND = ARCMINUTE.dividedBy(60);
-- 
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