Aparticle is traveling in the positive direction along an x axis, at a constant 5 m/s. which of the following describes the particle’s acceleration?
1- zero
2- negative
3-positive

Could someone . i have tried to solve myself but my calculation is off

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

What are the similarities & differences between a thermistor and a light dependent resistor in physics?