HELP A 147-Newton horizontal force is exerted upon a 3.1-kg box to move
it across a level surface at a constant velocity of 1.4 m/s. The force of
friction encountered by the box is Newton.
O 47
O 105
O 4.84
O 147

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=