Electric Forces. ... Just like objects that have mass exert gravitational forces on each other, objects that are charged will also exert electric forces on each other. The electric force is directly proportional to the charge of the two objects and inversely proportional to the distance between them squared.
The letter D represents the wavelength
I’ll say c Bc it make more since to find the travel distance
156 is the answer. so 156.25 is almost the same thing, you just round. It's not hard. Thank you!!!
Wave speed = (wavelength) x (frequency)
= (45 meters) x (9 per second)
= 405 meters per second .
