Question

Air pressures measured at the same time at four towns are given below. For every pair of towns named in the options, the distance between the two towns is the same (100 km). The pressures are: P: 101 200 Pa, Q: 100 400 Pa, R: 100 900 Pa, S: 101 000 Pa. Between which two towns will the wind blow the fastest?

Explain, step by step, how a cyclone forms over a warm ocean.