I need some geniuses to tell me their opinions on how time travel actually exists. 50pts because I am not playing around

What is the radius of the circular path ofa charged particle in a magnetic field?

Which type of wave can travel without a medium

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.