1. The lengths of the liquid column in a thermometer in 0 °C and 100 °C are 5 cm and 25 cm respectively. Find the length of the liquid column at 50 °C.
2. Please state three uses of limestone.
3. State the formation of a typhoon.
4. How do we test for the presence of vitamin C?
5. Find the distance between A (3,-2) and B (2,5).
7. What is the trigger point of the WW1?