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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
It is false.
False because every quadrilateral is a four sided shape
False. Mount Vesuvius destroyed Pompeii and Herculaneum.
False. Mount Vesuvius destroyed Pompeii and Herculaneum, but never threatened Rome.
False
False
false: matter cannot be destroyed
False
False. When iron rusts, iron atoms are not destroyed. Instead, iron atoms combine with oxygen in the presence of water to form iron oxide (rust), which causes the iron to corrode.
False, iron atoms are converted to iron oxide
yes
False. An active volcano is one that is currently erupting, has erupted recently, or is showing signs of erupting in the near future. A volcano that has not erupted in a long time is considered dormant.
False. Mechanical energy lost to friction is not destroyed; it is converted into other forms of energy, such as heat and sound. This conversion of energy accounts for the decrease in the total mechanical energy of a system when friction is present.
False. The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. The total mass of the reactants must equal the total mass of the products.