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true
true
False, a projectile is simply something that flies through the air irrespective of its shape. A football is a projectile. footballs are pointed though. Think: NERF bullets.
FALSE
Assuming that you mean not (p or q) if and only if P ~(PVQ)--> P so now construct a truth table, (just place it vertical since i cannot place it vertical through here.) P True True False False Q True False True False (PVQ) True True True False ~(PVQ) False False False True ~(PVQ)-->P True True True False if it's ~(P^Q) -->P then it's, P True True False False Q True False True False (P^Q) True False False False ~(P^Q) False True True True ~(P^Q)-->P True True False False
false
false
false
False
False
False. Liquid water in air forms a mixture, not a solution. A solution is a homogeneous mixture where one substance dissolves completely in another. In the case of water in air, the water droplets are dispersed throughout the air, but they do not dissolve in it.
false
false
It's a high-pressure zone with rising air. true or false
true
False. Air pollution refers to the presence of harmful or excessive quantities of substances in the air, while a sudden change in the acidity of a stream or lake is known as acidification.
False. The amount of water in the air is called humidity. Condensation is the process by which water vapor in the air turns into liquid water.