Answer:
4 km/h
Explanation:
Average speed = Distance / time
Distance = 2 km
Time = 30 minutes = 0.5 hours [For units to match]
Average speed
= 2 / 0.5
= 2 x 2
= 4 km/h
By several tries and studies
When the rock above a slanted fault line falls down relative to the rock underneath the fault, it is a normal fault.
Particles or molecules that are too big to fit through regular pores in the cell membrane, or have to big an electric charge, against the current of passive transport ( lower to higher ).