The concorde was a supersonic aircraft used for trans-atlantic travel in the 1980s and 1990s, having a length of 62.9 m when sitting on the ground on a typical day when the temperature is 18.0 ∘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 21.0 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 what is the temperature t of the concorde's skin in flight?

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Atomic nuclei of almost all elements consist of