Answer:
negative impact. Christopher Columbus's arrival in the Americas facilitated the exchange of plants, animals and diseases between the Old and New Worlds. For generations, Christopher Columbus was considered a hero of American history.
Explanation:
Had a Research project
Answer:
Blue
Explanation:
Blue color is used in the topographical map to show water bodies like perennial river, canal, well, tank and spring.
Answer:
Power generated by wind turbine at 8 m/sec will be 6400 KW
Explanation:
We have given at 2 m/sec power generated by turbine = 100 KW
We know that foe a wind turbine power 
here P is power and v is velocity of wind
So 
, here k is constant
So 
k = 12500
Now we have to calculate power at 8 m/sec
So power 
So power generated by wind turbine at 8 m/sec will be 6400 KW
Answer:
Water from rivers erodes the banks, the ice breaks up rocks, intense rainfall causes mass wasting, water from rainfall flows as runoff and creates ripples.
Explanation:
Earth has several spheres, all of which have their own unique characteristics that define them as such. Despite all of them being very different from each other, they can not exist in the form they are if there is no interaction with the other spheres, thus all of the spheres are interconnected and they depend on one another.
Two of those hydrospheres are the hydrosphere and geosphere, and they interact in many different ways. When there is rainfall, the water that ends on land flows as runoff until it reaches a water body, and while it does so it manages to create ripples in the ground. If there is intense rainfall in an area where there is steep and unstable terrain, it can easily cause mass wasting by oversaturating the soil with water. The water that flows in the rivers with its power is constantly eroding the banks. If water freezes and turns to ice because its volume becomes greater, it is able to break up rocks with the pressure it creates on them.
