How does uncertainty relate to measurements and calculations made during an investigation? There is uncertainty in each measurement, as indicated by significant figures.
There is uncertainty in each count of items used in a procedure.
There is no uncertainty in an answer calculated using significant figures.
There is no uncertainty if the best equipment is used correctly.

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration