Answer: (A) "X: May use LF, HF, and UHF waves
Y: Travels at the speed of light
Z: May use MF and VHF waves"
Answer - An object is in motion when its distance from another object is changing. ... A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.
Gasses take the shape of their container.
A gas fills a container which takes both the shape and the volume of that container.
Electrons move from the potassium atoms to the sulfur atoms.
According to Newtons third law the force of action has an equal and opposite reaction. So if the force of the bat hitting the ball is equal to 5 N, then reaction force of the ball has to be 5 N as well. So the correct answer is: the reaction force is equal to 5 N.
