When are magnitudes of two vectors added?
when the vectors have the same direction
when the vectors have equal magnitudes
when the vectors have the opposite direction

Heat from the sun reaches earth to a. radiation b. convection c. conduction

Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.