The filament of a lightbulb has a resistance of r0=12ω at 20 ∘c and 140 ω when hot. part apart complete part b in this temperature range, what is the percentage change in resistance due to thermal expansion? express your answer using two significant figures. rexpansion−r0r0r e x p a n s i o n − r 0 r 0 = 1100 %

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=

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

Five renewable energy resources are wind, sunlight, moving water and geothermal energy. question 2 options: true false