Awave travels through a medium because
a. the medium s particles are carried along with the wave.
b. the wave s energy passes from particle to particle.
c. the medium transfers electromagnetic energy.
d. the wave increases the potential energy of its medium.

in case you dont want to read the answer is B

what type of charge does it have? negative

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.