From those choices, the best is the third one.
it relates to why the sun and almost everything else in the solar system spins in the same direction, and also why the abundance of various elements in the planets is so different from what it is in the sun.
Electrons are found outside of the nucleus.
Answer:
![n=4.5\times 10^{13}](https://tex.z-dn.net/?f=n%3D4.5%5Ctimes%2010%5E%7B13%7D)
Explanation:
Initial charge, ![q_1=10\mu C](https://tex.z-dn.net/?f=q_1%3D10%5Cmu%20C)
After conduction, charge on the body becomes, ![q_2=-2.8\mu C](https://tex.z-dn.net/?f=q_2%3D-2.8%5Cmu%20C)
We need to find the number of electrons gained by this charged body.
Net charge,
![q=q_1+q_2\\\\=10+(-2.8)\\\\=7.2\ \mu C](https://tex.z-dn.net/?f=q%3Dq_1%2Bq_2%5C%5C%5C%5C%3D10%2B%28-2.8%29%5C%5C%5C%5C%3D7.2%5C%20%5Cmu%20C)
Let n be the number of electrons gained by this charged body. So,
![q=ne\\\\n=\dfrac{q}{e}\\\\n=\dfrac{7.2\times 10^{-6}}{1.6\times 10^{-19}}\\\\=4.5\times 10^{13}](https://tex.z-dn.net/?f=q%3Dne%5C%5C%5C%5Cn%3D%5Cdfrac%7Bq%7D%7Be%7D%5C%5C%5C%5Cn%3D%5Cdfrac%7B7.2%5Ctimes%2010%5E%7B-6%7D%7D%7B1.6%5Ctimes%2010%5E%7B-19%7D%7D%5C%5C%5C%5C%3D4.5%5Ctimes%2010%5E%7B13%7D)
So,
electrons gained by this charged body.
Answer:
Velocity = v = 2.24m/s
Acceleration = a = 0.20m/s²
Explanation:
Please see attachment below.
Given
z=(−8 cosθ) and θ = 0.3t
z = -8Cos (0.3t)
V = dz/dt
a = v²/R.
Please see full solution below.