Air.
You are a liquid. Liquids do not have a definite shape or volume, take the shape of their container, have weight, and cannot be held in the traditional sense.
microrganisms
Since we cannot see either your pebble or the photo, we cannot answer the question for you.
(1)Gas dosent have a definite shape (2) it is in plasma state in which we cannot see or touch anything. (3) its molecules r not closely packed so as to form a touchable structure. Dx...
If you are talking about physical objects, there are few objects at subatomic scales that can be considered to have no shape or volume. For example, a singularity at the center of a black hole, not the event horizon but the actual singularity that creates all the effects you see around it, is an infinitely small point in space: no shape or volume (as you will see in the next paragraph). If you are asking mathematically (geometrically), then the only structure, with both those characteristics, is a point. Whatever the space you choose to use to observe a point in a geometrical point of view, a point is always infinitely small. If it had any shape or volume, then that would imply there would be more points composing it, which would mean it was actually not a point. A line has no volume, but it does have shape, and everything with limits along more dimensions has volume.
No, you cannot see through it unless it is laced, (highly doubt that) or meant to be see through. Yes, it will be tight, so you can see your body shape more, but you cannot see through it.
If you are talking about physical objects, there are few objects at subatomic scales that can be considered to have no shape or volume. For example, a singularity at the center of a black hole, not the event horizon but the actual singularity that creates all the effects you see around it, is an infinitely small point in space: no shape or volume (as you will see in the next paragraph). If you are asking mathematically (geometrically), then the only structure, with both those characteristics, is a point. Whatever the space you choose to use to observe a point in a geometrical point of view, a point is always infinitely small. If it had any shape or volume, then that would imply there would be more points composing it, which would mean it was actually not a point. A line has no volume, but it does have shape, and everything with limits along more dimensions has volume.
we have a horizon which means that we cannot see all of the earths surface
As we cannot see the paperweight, all I can do is tell you from the information you have given us how to calculate its mass: Find the volume of the paperweight - it will either be explicitly given or is calculable based on the shape of the paperweight; then: mass = volume × density = volume × 3.5 g/cm³ As long as the volume is given in cm³, the mass will be given in g.
The density of minerals is a measure of weight vs volume of the mineral. See related links for more details.
Litres is a VOLUME. Ton is a WEIGHT. Can you not see that difference
Mg is a WEIGHT. Cup is a VOLUME, do you see the difference? Dense items like salt will have a different volume than items like flour.