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10 Cards in this Set

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 QUESTION What is a vector? ANSWER A vector is a physical quantity that requires both direction and magnitude fora complete description. QUESTION What is force? ANSWER Force is a push or pull that causes a change in motion of an object. QUESTION Name the four energy systems. ANSWER The four energy systems are mechanical system,fluid system, electrical system, and the thermal system. QUESTION Is mass and weight the same thing? ANSWER No, mass is a measure of the amount of matter in an object(unchanged with its location) and weight is the measure of the pull of the earth on the object. QUESTION List the four prime movers. ANSWER 1)force 2)pressure 3)voltage 4)pressure difference QUESTION What is torque? ANSWER Torque is a forcelike quantity in the rotational mechanical system measured in Pound-feet or Newton-meters QUESTION ANSWER QUESTION What is specific gravity? ANSWER It is a dimensionless number that comares the density of a substance with that of water. QUESTION What is density? ANSWER It is the mass per unit volume of a gas, liquid, or solid substance. QUESTION What is a scalar? ANSWER A scalar is a physical quantity that requires only magnitude for its description.