Lightning occurs when there is a flow of electrons between the ground and thethunder cloud. the maximum rate of flow (current) is about 20,000 c/s (amps), andit lasts for about 100 microseconds. how much charge flows between the groundand the cloud in this time? how many electrons flow during this time?

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.

Ive never heard of creep meters