A64.0-kg hiker is descending a mountain that has a peak altitude of 2350 m above sea level. the hiker has a device that measures her potential energy, and when she is at the peak of the mountain she decides to "zero" it (that is, she sets the zero point of potential energy to be the mountaintop). what does her potential energy device read sometime later on her descent when she is 1960 m above sea level

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?