When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed. However, a change in average kinetic energy is not directly proportional to a change in average speed. 1.
An appreciation means an increase in the value of a currency. It means a currency is worth more in terms of foreign currency.
At Foreign Currency and Coin Exchange we are here to serve our customers by helping them with all of their currency needs. We will exchange your foreign currency, bills and coins, from just about every country in the world. We buy silver coins, gold coins, collectible coins and sets as well. We will even buy your obsolete currency that has no exchange value anymore. We even have a commercial coin counter so if you have a bunch of U.S. coins you can ship them to us and we will count them for you.