Solve these problems about lumber dimensions.
(a) to describe to a european how houses are constructed in the us, the dimensions of " two-by- four" lumber must be converted into metric units. the thickness x width x length dimensions are 1.50 in. x 3.50 in. x8.00 ft in the us. what are the dimensions in cm x cm xm?
(b) this lumber can be used as vertical studs, which are typically placed 16.0 in. a part. what is that distance in centimeters?

Answer :

(a) The dimensions in are,

(b) The distance in centimeters is, 40.64 cm

Explanation :

(a) The conversion used :

and,

As we are given the thickness, width, length dimensions in inches, inches and feet respectively.

Now we have to determine the thickness, width, length dimensions in centimeter, centimeter and meter respectively.

The dimensions in are,

(b) The conversion used :

As we are given the distance in inches. Now we have to determine the distance in centimeter.

The distance in centimeters is, 40.64 cm

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.