Which of the following best defines longitudinal wave?

a. in a longitudinal wave, particle displacement is parallel to the direction of wave motion.

b. in a longitudinal wave, particle displacement is above the direction of wave motion.

c. in a longitudinal wave, particle displacement is opposite to the direction of wave motion.

d. in a longitudinal wave, particle displacement is perpendicular to the direction of wave motion.

The one that best defines longitudinal wave is : A. in a longitudinal wave, particle displacement is parallel to the direction of wave motion
The particle will simply oscillate back and forth about their individual equilibrium positions

hope this helps

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.