The two substances needed in this situation are:
potato extract and catechol<span />
Answer:
B Nitrates
Explanation:
No explanation here sorry •~•
In classical mechanics, a particle is in mechanical equilibrium if the net force on that particle is zero. ... In terms of momentum, a system is in equilibrium if the momentum of its parts is all constant. In terms of velocity, the system is in equilibrium if velocity is constant.
