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.
Additional costs: Annual local dog-licensing fees usually range from $5 to $50. It often costs more to license a dog that has not been neutered or spayed. The average dog owner spends $41 per year on toys, according to the American Pet Product Manufacturers Association. If a dog is injured or gets seriously ill or has an emergency outside of normal business hours, extra veterinary care can cost hundreds to thousands of dollars.