السلام عليكم ...
ارجوكم الي يعرف يحل هالاسئله أكوون شاكرة له ...
1..As concrete dridries it shrinks – the higher the water content , the gearter the shrinkage . if a concrete beam has a water content of W Kg \m3 then it will shrink by a factor S = 0.032W-2.5\10000 where S is the fraction of the original beam length that disappears due to shrinkage .
A beam 12.025m long is cast in concrete that contains 250Kg \m3 water . what is the shrinkage factor S? how long will the beam be when it has dried
b)A beam is 10.014m long when wet . we want it to shrink to 10.009m , so the shrinkage factor should be S=0.0005 . how much water content will provide this amount of shrinkage ?
2) if an imaginary line segment is drawn between the centre of the earth and that of the moon , then the net gravitational force F acting on an object situated on this line segment is F =-k\X2 +0.16k\(239 –x)2 where K >0 is aconstant and X is the distance of the object from the centre of the earth , measure in thousands of miles . how for form the centre of the earth is the *dead spot*where no net gravitational force acts upon the object ?
3) Solve the following inequalities:
a). |x-1|<|x-3|
ضرووري لو سمحتوا ...
ارجوكم الي يعرف يحل هالاسئله أكوون شاكرة له ...
1..As concrete dridries it shrinks – the higher the water content , the gearter the shrinkage . if a concrete beam has a water content of W Kg \m3 then it will shrink by a factor S = 0.032W-2.5\10000 where S is the fraction of the original beam length that disappears due to shrinkage .
A beam 12.025m long is cast in concrete that contains 250Kg \m3 water . what is the shrinkage factor S? how long will the beam be when it has dried
b)A beam is 10.014m long when wet . we want it to shrink to 10.009m , so the shrinkage factor should be S=0.0005 . how much water content will provide this amount of shrinkage ?
2) if an imaginary line segment is drawn between the centre of the earth and that of the moon , then the net gravitational force F acting on an object situated on this line segment is F =-k\X2 +0.16k\(239 –x)2 where K >0 is aconstant and X is the distance of the object from the centre of the earth , measure in thousands of miles . how for form the centre of the earth is the *dead spot*where no net gravitational force acts upon the object ?
3) Solve the following inequalities:
a). |x-1|<|x-3|
ضرووري لو سمحتوا ...
: 
: 
: