Most metals are good conductors of heat and they are solids at room temperature. Mercury is the only one in liquid state at room temperature, and has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. This is the reason behind mercury and alcohol being used in thermometer. Some of the principles of the thermometer were known to Greek philosophers of two thousand years ago.
Veterinary/Medical costs: $160 â 670. The cost of spaying or neutering a dog is $50-200 depending on the size of the dog and whether there are health conditions that can complicate the surgery. A routine veterinary exam runs from $45-150. The cost of puppy vaccinations and boosters is $20-150.
The RSPCA estimates that the average dog costs its owner Â£5,664 over a 12-year life. Add on annual vet fees, insurance, bedding and the odd choccy treat and that sum rises to a few quid shy of Â£10,000, or Â£833 a year. About the price of a small family hatchback. Cats aren't much cheaper either. The RSPCA reckons the cost of a moggy over 14 years - the average life span - is Â£9,450 (Â£675 a year).