应助达人
比重
比重是指在25度下,处于空气中的物质的重量与同温度同体积下水的重量的比值。
影子(hyheying) 发表:Reaction Time
Reaction time is 5 minutes unless otherwise specified.
Specific Gravity
Specific gravity is the weight of a substance in air at 25 divided by the weight of an equal volume of water at the same temperature.