Ahiker wears a 7.5-kg backpack while climbing a mountain. after 30.0 min, the hiker is 8.2 m above the starting point. what is the average amount of power created by the hiker?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o