The answer is 12.5 kg because 250N / 20m/s^2
I hope that helped
Here in the process we require
1. Heat to melt down all ice
2. Heat to raise the temperature of whole water to 100 degree C
3. Heat to boil off the water
now here for the first part
Heat required to melt the ice


now heat required to raise the temperature to 100 degree C



Now heat required to boil it off


now the total heat required will be



so it required 287200 calorie heat to boil it all water
Answer:
When force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.
Explanation:
Hope this helps you
The answer is true!! Plants rely on animals to distribute seeds and animals depend on plants for food shade etc.
Answer:

Explanation:
Due to uniform electric field net flux through a closed surface is always zero
so here we have to find the net flux through a sphere due to a point charge placed at origin and due to a uniform electric field
so here we will have

now we have


Due to external uniform field the electric flux is zero
so the total flux is only due to charge and it is equal to
