HELP PLZ!!!!
1 answer:
You might be interested in
Step-by-step explanation:
The electrical force between two unlike charge is given by :
k is electrostatic constant
q₁ and q₂ are two charges
r is the distance between charges
It is clear that the electric force is inversely proportional to the square of the distance between them.
The graph F as a function of r for two positive charges is shown in the attached figure. It is a hyperbola.
4] Which perfect square root is close to ?
Well we know that 7 times 7 is 49, and 6 times 6 is 36, so our answer will be between and
The closer root is , so we can approximate that the square root of 39 is around <u><em>6.2</em></u>.
5] We can do a similar step-by-step here.
4 times 4 is 16, and 5 times 5 is 20.
This gives us and
Well, they are both equal distance from (2), so we can do this:
We know it'll be between 4 and 5 (the number plot in the answer lets us know that too)
4 times 4 is 16
4.1 times 4.1 is around 16.8
4.2 times 4.2 is about 17.64
4.3 times 4.3 is 18.49
Now that we have an 18, we can stop going and see which one is closer.
18 - 18.49 = -0.49
18 - 17.64 = 0.36
4.2 times 4.2 is closer, so we can approzimate that is around 4.2
- See attachment for number line plot
Note] Hope this helps! Upon using a calculator I can confirm these answers are correct :D
