Would the specific gravity of mercury be the same on the moon where gravity is one sixth of that on the earth?

Answer 1

Specific gravity (Sg) is a value that relates substance x (in this case Mercury) to that of water. Notice that Sg is unit-less, thus its a ratio value, and constant. So yes, specific gravity of any substance is the same everywhere, be it earth, the moon, or Pluto.

note: Obviously gravity is different on the moon, as you mentioned about 1/6th that of earth. Finding a force of a certain substance on the moon is found by multiplying the density of water by the specific weight of the substance, multiplied by the gravitational pull. Thus, it is not nessicary to change the specific gravity of the substance.

Answer 2

Specific gravity is defined as the density of the liquid divided by the density of water. Since density is mass/volume, gravity plays no part in determining the specific gravity of a substance.

Specific gravity relies on mass and volume, not gravity. It is poorly named.

The specific weight, however of Mg (Mercury) on the moon would be different than that on earth, because specific weight is density times the gravitational constant.

Answer 3

Weight density is not a term. Weight is the effect of gravity on a Mass and will be less on the Moon since the moon has less mass and therefore less gravity than the Earth. Density is mass/volume and since mass is constant, density would also be constant.

Answer 4

yes, specific gravity is the weight ratio to same volume of water, thus is not influenced by the local gravity