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Q7: Immanuel Kant's principle, called the categorical imperative,
Q8: Producing what the buying public wants may
Q11: When liquids change to a solid state,
Q45: Ice has a lower density than water
Q55: Planets would crash into the sun if
Q64: An airplane flies at 40 m/s at
Q75: When water vapor condenses on the inside
Q75: Two identical gliders slide toward each other
Q82: The force required to maintain an object
Q97: A car's engine is 20% efficient. When