Mercury drops in a petri dish with a thermometer. Mercury,or quicksilver,is a dense,silvery metal that is liquid at room temperature. The metal has a high surface tension,and so small droplets form almost perfect spheres,accounting for its quick- flowing motion when spilt. Despite its toxicity,mercury's uniform expansion over the Celsius scale and its high thermal conductivity (allowing it to be sensitive to temperature changes) explains its use in bulb thermometers | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 3253 px × 4363 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |