Answer:
The SI unit for electric chargeis the C (which is the abbreviation of Coulomb}
Explanation:
The SI unit for electric chargeis the Coulomb. The letter used is the C.
1 C = 1 As
Answer:
option D is correct
Explanation:
cl has 17 electrons if it has 18 it becomes cl-
<span>which of those can we not get back once it has been used, the answer is oil or petroleum</span>
Answer
given,
Echo time = t = 1000 s
speed = ?
![v = \dfrac{d}{t}](https://tex.z-dn.net/?f=v%20%3D%20%5Cdfrac%7Bd%7D%7Bt%7D)
a) speed of electromagnetic wave
![c = \dfrac{d}{t}](https://tex.z-dn.net/?f=c%20%3D%20%5Cdfrac%7Bd%7D%7Bt%7D)
wave travels Venus two time
![c = \dfrac{2d}{t}](https://tex.z-dn.net/?f=c%20%3D%20%5Cdfrac%7B2d%7D%7Bt%7D)
![d = \dfrac{ct}{2}](https://tex.z-dn.net/?f=d%20%3D%20%5Cdfrac%7Bct%7D%7B2%7D)
![d = \dfrac{3 \times 10^8\times 1000}{2}](https://tex.z-dn.net/?f=d%20%3D%20%5Cdfrac%7B3%20%5Ctimes%2010%5E8%5Ctimes%201000%7D%7B2%7D)
d = 1.5 x 10¹¹ m
b) now, echo time
![c = \dfrac{2d}{t}](https://tex.z-dn.net/?f=c%20%3D%20%5Cdfrac%7B2d%7D%7Bt%7D)
![t = \dfrac{2d}{c}](https://tex.z-dn.net/?f=t%20%3D%20%5Cdfrac%7B2d%7D%7Bc%7D)
![t = \dfrac{2\times 75}{3 \times 10^8}](https://tex.z-dn.net/?f=t%20%3D%20%5Cdfrac%7B2%5Ctimes%2075%7D%7B3%20%5Ctimes%2010%5E8%7D)
t = 5 x 10⁻⁷ s