8) A plastic rod, initially uncharged, is rubbed with wool and obtains a charge of 10 C. What is the charge on the wool after rubbing?

The charge on the wool after rubbing is - 10 C

Explanation:

Every uncharged body is electrically neutral, if the plastic rod acquires 10 Coulombs of charge after been rubbed with wool, then the wool will be left with an equal but opposite charge. This shows that the initial charge on the wool is 10 protons and 10 electrons and when the plastic acquires 10 C (10 protons), the wool will be left with excess 10 electrons.

Therefore, the charge on the wool after rubbing is - 10 C (negative 10 Coulombs).

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

prolly a beacuse the momentuem the car has increases while going down hill