Answer:
Its A. Walking on the beach
Diameter is the longest part of the circle that can be measured by taking a line across the middle point of the circle. It's hard to measure diameter accurately because you can't know which was the middle point of the circle. You must draw an imaginary line and if you are missed your calculation will be less than it should be.
Answer:
s=800 m
Explanation:
Given that,
Acceleration of a runner, a = 4 m/s²
Time, t = 20 seconds
We need to find the distance covered by her. Initially, she was at rest. It means its initial velocity is equal to 0. So, using second equation of motion as follows :
![s=ut+\dfrac{1}{2}at^2](https://tex.z-dn.net/?f=s%3Dut%2B%5Cdfrac%7B1%7D%7B2%7Dat%5E2)
Herre, u = 0
![s=\dfrac{1}{2}at^2\\\\s=\dfrac{1}{2}\times 4\times (20)^2\\\\s=800\ m](https://tex.z-dn.net/?f=s%3D%5Cdfrac%7B1%7D%7B2%7Dat%5E2%5C%5C%5C%5Cs%3D%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%204%5Ctimes%20%2820%29%5E2%5C%5C%5C%5Cs%3D800%5C%20m)
So, she will cover a distance of 800 m.
Your answer would be D. "Mam"
Answer:
0.0217 m
Explanation:
Ftom the question,
Applying Coulomb's law
F = kqq'/r²............... Equation 1
Where F = Electric Force, q and q' = First and second charge respectively, r = distance between the charges, k = coulomb's constant.
make r the subeject of the equation
r = √[(kqq')/F]............. Equation 2
Given: q = +3.6×10⁻⁸ C, q' = -3.2×10⁻⁸ C, F = -2.2×10⁻² N
Constant: k = 8.98×10⁹ Nm²/C²
Substitute these values into equation
r = √(+3.6×10⁻⁸×-3.2×10⁻⁸×8.98×10⁹/-2.2×10⁻²)
r = √(-103.4489×10⁻⁷/-2.2×10⁻²)
r = √(47.02×10⁻⁵)
r = 21.68×10⁻³
r ≈ 21.7×10⁻³ m.
r ≈ 0.0217 m
Hence the seperation between the two balloons is 0.0217 m