Evaporation and condensation
High temperature, high pressure, and the presence of hydrogen isotopes like deuterium and tritium are necessary conditions for the continuous fusion of hydrogen to occur in a controlled manner.
yeast and sugar.
For evaporation to occur, there must be heat energy available to increase the kinetic energy of the liquid molecules so they can escape into the air as vapor. Additionally, there should be an open space for the vapor to escape into the atmosphere.
Probable cause or a warrant.
x and y must both be positive.
For a marketing exchange to occur, there must be two parties involved - a buyer and a seller. Both parties must have something of value that the other party desires, such as a product or service. There must also be a communication channel through which the exchange can take place, such as advertising or personal selling.
idk
Low or no oxygen.
Energy
poo on bread
In order to do work, two conditions that need to exist are a force must be applied on an object and the object must move in the direction of the applied force. If either of these conditions is not met, work is not being done on the object.