A thermocouple produces a voltage when the temperature of one of the contact points differs from the temperature of another, in a process known as the thermoelectric effect.he wires that make up the thermocouple must be insulated from each other everywhere, except at the sensing junction. Any additional electrical contact between the wires, or contact of a wire to other conductive objects, can modify the voltage and give a false reading of temperature.
There are exactly 20 nickels in a dollar. Each individual nickel is worth 5 cents, and there are 100 cents in a dollar. Since 20 multiplied by 5 is equal to 100, there are 20 nickels per dollar. Continue Reading. The nickel is the second lowest denomination coin in the United States currency system, with the penny being the lowest at 1 cent.
All US nickels, except for war nickels made during WWII, are made  of an alloy of 25% nickel and 75% copper.    War nickels were struck from late 1942 to 1945. They â¦contained an  alloy of 56% copper, 35% silver, and 9% manganese because nickel  metal was needed for the war effort. These coins are distinguished  by a large mint mark letter over the dome of Monticello on the  back. Internet rumors to the contrary, these are the only US  nickels that ever contained silver.