JLPT · Level 150
15 words
Japanese word
比重
Pronunciation
Romajihijū
Meaning
- nounspecific gravity
Example
水の比重は一です。mizu no hi jū wa ichi de su
The specific gravity of water is one.
More examples
金属の比重を調べるには、専用の装置を使います。kin zoku no hi jū o shira be ru ni wa sen yō no sō chi o tsuka i ma su
To determine the specific gravity of a metal, use a special device.
Core concept
Describes how dense a substance is by comparing it with a chosen standard, usually water.
Common phrases
比重を求めるhi jū o moto me ru
calculate specific gravity
比重の差hi jū no sa
difference in specific gravity
比重を測定するhi jū o soku tei su ru
measure specific gravity
Similar words
密度mitsudo: A measure of how much mass a substance has in a certain volume.
Definition in Japanese
ある物質の密度を基準となる物質の密度と比べた値。a ru bus shitsu no mitsu do o ki jun to na ru bus shitsu no mitsu do to kura be ta atai
Word origin
The Sino-Japanese compound 比重 (hijū) combines 比 (hi, "compare") and 重 (jū, "weight"), expressing a comparison of a substance's density.
Usage tips
- Unlike density, specific gravity is a unitless ratio, so it shows relative density rather than mass or volume by itself.