Cavity wall insulation costs £240 but will save you £32 each year. What is the payback time for cavity wall insulation? (Do not round your answer.)

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

higher potential

explanation:

because it is in a high speed so it must move into a of high potential

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation