001/*
002 * Units of Measurement API
003 * Copyright (c) 2014-2021, Jean-Marie Dautelle, Werner Keil, Otavio Santana.
004 *
005 * All rights reserved.
006 *
007 * Redistribution and use in source and binary forms, with or without modification,
008 * are permitted provided that the following conditions are met:
009 *
010 * 1. Redistributions of source code must retain the above copyright notice,
011 *    this list of conditions and the following disclaimer.
012 *
013 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
014 *    and the following disclaimer in the documentation and/or other materials provided with the distribution.
015 *
016 * 3. Neither the name of JSR-385 nor the names of its contributors may be used to endorse or promote products
017 *    derived from this software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
021 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
023 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
028 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package javax.measure.quantity;
031
032import javax.measure.Quantity;
033
034/**
035 * Measure of the quantity of matter that a body or an object contains. The mass of the body is not dependent on gravity and therefore is different
036 * from but proportional to its weight. The metric system unit for this quantity is "kg" (kilogram).
037 *
038 * The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed
039 * numerical value of the Planck constant h to be 6.626 070 15 × 10⁻³⁴ when expressed
040 * in the unit J s, which is equal to kg m² s−1, where the metre and the second are
041 * defined in terms of c and ∆νCs.
042 *
043 * This definition implies the exact relation h = 6.626 070 15 × 10−34 kg m² s⁻¹. Inverting this
044 * relation gives an exact expression for the kilogram in terms of the three defining constants
045 * h, ∆νCs and c:
046 *
047 * 1 kg = (h / 6.626 070 15 × 10⁻³⁴) m⁻² s
048 * <br>
049 * <dl>
050 * <dt><span class="strong">API Note:</span></dt><dd>SI Base Unit</dd>
051 * </dl>
052 *
053 * @author <a href="mailto:jean-marie@dautelle.com">Jean-Marie Dautelle</a>
054 * @author <a href="mailto:werner@uom.technology">Werner Keil</a>
055 * @author <a href="mailto:thodoris.bais@gmail.com">Thodoris Bais</a>
056 * @version 2.0
057 * @since 1.0
058 *
059 * @see <a href="https://en.wikipedia.org/wiki/Mass">Wikipedia: Mass</a>
060 * @see RadiationDoseAbsorbed
061 */
062public interface Mass extends Quantity<Mass> {
063}