What do particulates in the atmosphere do? A: They trap heat
B: They help plants to grow better
C: They shield Earth's surface from harmful solar radiation
D: They nucleate water vapor to form clouds.

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

a) the particles of the chair are strongly held together.

im pretty sure its b