Final answer:
When calculating potential energy, the formula PE = mgh is used, but the mass of the 500 yen coin and the height from which it's dropped are needed to perform the calculation. Currency exchange rates, such as the yen to the dollar rate, can fluctuate and impact international trade and economic stability.
Step-by-step explanation:
Calculation of Potential Energy
When an object is dropped from a height, its potential energy at the starting point can be determined using the formula: PE = mgh, where PE is potential energy, m is mass, g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height above the reference point. If we are to calculate the potential energy of a 500 yen coin, we would need its mass and the height from which it is dropped. However, without the mass of the coin, we cannot calculate the potential energy. It is important for the student to understand that when the coin is dropped, its potential energy will convert into kinetic energy as it falls, and upon hitting the ground, some energy is transferred into thermal energy.
Currency Exchange Rates
The exchange rate between currencies can fluctuate over time due to various economic factors. When considering currency exchange rates, such as the Japanese yen to the US dollar, these rates can affect businesses and economies extensively, especially in relation to international trade. The currency exchange rate for the Japanese yen against the US dollar has experienced fluctuations over the years, as indicated in the given historical data.