The concorde was a supersonic aircraft used for trans-atlantic travel in the 1980s and 1990s, having a length of 62.5 m when sitting on the ground on a typical day when the temperature is 16.0 ∘c . the concorde is primarily made of aluminum. in flight at twice the speed of sound, friction with the air warms the concorde's skin and causes the aircraft to lengthen by 25.0 cm . (the passenger cabin is on rollers, so the airplane expands around the passenger cabin.) take the coefficient of linear expansion for aluminum to be α = 2.40×10−5 /∘c

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

The answer would be true

Work is the answer 

Iwould say the answer is: the distance between two crests of a wavehope that : )