(a) it is known that the lip at a cannot withstand a (vertical) force greater than fm. derive an equation to calculate the maximum height of water in the reservoir (call it hm) which ensures that the force on the gate at a does not exceed the maximum. all equations used must be labeled/described in a few words. any symbol not given above must be de ned. (b) the manufacturer has speci ed fm = 400 kn. the hydraulic engineer wants to keep a 10% safety margin, hence the force at a cannot exceed 0: 9fm. calculate a numerical value for the maximum allowed water height in this case. assume = 1000 kg/m3, g = 9: 8 m/s2, b = 3 m, l = 4 m, w = 100 kn. (c) for the conditions in (b), will the force at the hinge exceed the maximum fm? show calculations to conclude yes or no.

It should be d if not then c

Iwould think it is temperature, silica, oxides (gases)

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3