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physics final examz

QuestionAnswer
newtons first law of motion Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
newtons second law of motion The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors; in this law the direction of the force vector is the same as the direction of the acceleration vector
newtons third law of motion For every action there is an equal and opposite reaction.
efficiency useful work per quantity of energy
Ohm's Law Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere
Power is the rate at which work is performed or energy is converted
kirchoffs law series- current is constant & voltage divides unevenlyparallel- voltage is current &current divides
Maxwell's law a changing electric field induces a changing magnetic field. the fields are both proportional& perpendicular LIGHT!
Faraday's law a changing magnetic field induces a changing electric field. the fields are both proportional& perpendicular
big bang theory the universe begin as a singularity not an atom that contained all the mass of the entire universe in zero space
universal law of gravitation every massive particle in the universe attracts every other massive particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
inverse square law any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity
doppler effect the change in frequency of a wave for an observer moving relative to the source of the wave
Created by: lenaej