20. While out for a walk with his mother, Lance notices a larre, cylindrical gray box high atop a telephone pole. His mother explains that it is a transformer. This transformer takes 3200 V from the power
company and steps it down to the 120 V supplied to each of the houses on the street, with the use of a
secondary coil. If the current entering the house is 0.9 A, what is the current prior to entering the house?
Round to the hundredths place.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.