Glass
(most dense to least dense) gold, mercury, water, oxygen
Electricity flows through the path of least resistance. Electricity will flow through anything conductive; metals, liquids, and even through small particles. Your insulators are porcelain, glass, plastics, wood and cloths. All variances of voltage is deadly. The most dangerous thingabout electricity is the current or amperage. As little as 17 miliamps can stop your heart.
This study would fall under the broad heading of ceramics at least. Optics is a study of light waves and their interactions.
Mercury has about the most perfectly spherical shape, but Saturn has the leastspherical shape (next least spherical is Jupiter).
Mercury is the closest planet to the Sun and the second hottest and second smallest planet in the Solar System. One of Mercury's major features is the Caloris Basin. This large basin (or maria) has a diameter of 1300 kilometers. The Caloris Basin was probably caused by a large impact in the days of the early Solar System. One special feature about Mercury is that it has no plate tectonics. Also, Mercury possesses a thin atmosphere that consists of atoms blown from the surface by solar winds blasted through space by the Sun.Mercury is the closest planet to the Sun.
No. Mercury is actually rather conductive, being a metal.
Oil will sink in water, so is the least dense.
no, rubber is
Glass is a bad conductor of heat, it has to be thin. So that heat should eventually pass to the mercury. And for that purpose we have to keep thermometer for at least two minutes in position.
Lack of any media like vacuum
Cork is less dense than water because it floats. Both glass and Mercury (a metal) are denser than water.
the condition of poverty
mercury
Mercury
(most dense to least dense) gold, mercury, water, oxygen
A solution which contains ions is conductive, since the ions are electrically charged and can respond to a voltage. A solution which does not contain ions, but instead has intact molecules (such as sugar, to give a common example) is not very conductive. Of course, water always contains at least a small amount of ions since water itself dissociates into H+ and OH- ions, at least to a slight degree, so water is always at least mildly conductive. There are other solvents and other solutions which are entirely non-conductive.
Air, or some other gas, if you really want to get specific. Pure water is the least conductive substance. It is actually used as an electrical insulator by technology labs. The reason it is not widely used is that it is very expensive to produce. It is only the impurities in water that allows electricity to be conducted through it.