state three ways in which a river's energy is used up?

Answer 1

rivers energy is used for following purposes

a very common is to generate electrical energy in which water is stored and then used to generate when required

another one is in hilly areas where wood cutting is a business trees cut from tall mountains are to be sent at the bottom then the river flow is used to send the cut tree barks through the water water channel, generally different enterprises paint the barks with different colors to identify

another could be the water flow is used to trap fishes by fisher mans the usually arrange their nets according to the water flow

Answer 2

As the water is moving or flowing down the river its kinetic energy or energy due to motion is being used up. If the river has a water fall then its gravitational potential energy can be used. Gravitational potential energy is energy due to height. Eg. the waterfall is high up and the water uses this energy as it falls down the waterfall.
Rivers also have chemicals because of dissolved rocks and minerals, and sometimes the chemical concentration in the water can be so high that it ends up dissolving rocks already in the river, so this in some way can be the use of its chemical energy.
Regards,
Honey Cheeks.

Answer 3

1: Friction with the shoreline and underwater obstacles

2: Evaporative cooling

3: Absorbtion of energy by the sea upon discharge

Answer 4

erosion (of the river banks - includes abrasion, attrition, hydraulic action and the other one)

transportation (of the load - includes saltation, traction, suspension)

friction (with the bed)

Answer 5

to erode rocks and to move rocks to the bottom or the mouth of the river and will moving down the rocks break down into smaller pieces until it reaches the mouth of the river