Step 1 : Introduction to the question "5. Many modern timepieces use a certain crystal which, when shaped correctly, emits a frequency that can be accurately calculated. This creates a very accurate timepiece. Which crystal is used?"
...1. diamond 2. quartz 3. potassium dihydrogen phosphate 4. halite Quartz crystals have electric properties when a physical stress is applied to them. In watches, the crystal is shaped into a sort-of tuning fork and emit a frequency of 32,768 Hz. These oscillations are counted and then a second is recorded by the timepiece. This gives a very accurate way of measuring time, and the Swiss standard allows a timepiece of this sort to be off by only ten seconds a year.
