The NASA Glenn Research Center in Cleveland, Ohio reports that its Xenon Ion
Thruster has operated continuously in a vacuum chamber for 48 000 hours and has
now been shut down voluntarily.
The Total Impulse delivered was 30 MNs (million newton seconds) during this
test period by the
Assume? I rarely assume, but I did look it up. According to
https://en.wikipedia.org/wiki/Speed_of_sound The speed of sound is the
distance travelled during a unit of time by a sound wave propagating
through an elastic medium. In dry air at 20 °C the speed of sound is
343.2 metres per
