adrianbanuelos1999

19.12.2019 • 

Physics

If sustainable and practical irrigation methods are not followed, what negative consequence can occur in and around the soils of agricultural land?
a) decreased nitrogen in the soil can occur as fertilizers are not often injected in the irrigation water.
b) increased salinization of the soil can occur when salts in the irrigation water are left behind after evaporation.
c) increased porosity of the soil can occur as water from irrigation systems further weather the rocks within the soil.
d) increased organic matter can occur as the water can promote the breakdown of remaining plants parts in and around the agricultural field.
e

Ответ:

dommalb

11.01.2021

Physics

---

The appropriate solution is "61.37 s".

Explanation:

The given values are:

Boat moves,

= 10 m/s

Water flowing,

= 1.50 m/s

Displacement,

d = 300 m

Now,

The boat is travelling,

=

=

Travelling such distance for 300 m will be:

⇒

     

On putting the values, we get

     

     

Throughout the opposite direction, when the boat seems to be travelling then,

=

=

Travelling such distance for 300 m will be:

⇒

     

On putting the values, we get

     

     

hence,

The time taken by the boat will be:

=

=

---

0,0(0 оценок)