7.7. a painter leans his back against a painted wall while looking into a 1m long mirror at the opposite end of a rectangular room as shown in the given figure. how much of the painted wall can he see through the given mirror?

a. 1m
b. 2m
c. 12m
d. 6m

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck

The correct answer would be b) volume versus temperature, because they are also directly proportional.

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻

The correct answer is:   [a]:   "polar easterlies move cool air to the mid-latitudes."