Question

What is the average speed of the spacecraft ? $\bold{(In \: \: m/s)}$

$\bigcirc \: \:$ 180 m/s
$\bigcirc \: \:$ 5200 m/s
$\bigcirc \: \:$ 3.1 m/s
$\bigcirc \: \:$ 31 m/s

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Answer 1

$\huge\boxed{\fcolorbox{purple}{ink}{Answer}}$

After 2 hr and 33 min in Earth orbit, the S-IVB rocket engine was reignited for acceleration of the spacecraft to the velocity required to escape Earth's gravity. Although at times the spacecraft reached speeds near 40,000 km/hr, the average speed was about 5500 km/hr

Answer 2

for some reason, a one-line "aligned" is not properly centered. this appears to be a bug, and i am entering it as such in the amsmath bugs list.

for some reason, a one-line "aligned" is not properly centered. this appears to be a bug, and i am entering it as such in the amsmath bugs list.this (unwanted) result can be easily demonstrated by two additions to your test file:

• for some reason, a one-line "aligned" is not properly centered. this appears to be a bug, and i am entering it as such in the amsmath bugs list.this (unwanted) result can be easily demonstrated by two additions to your test file:(1) replicate the (simple) example with the content of the first aligned duplicated, to give a two-line aligned;

• for some reason, a one-line "aligned" is not properly centered. this appears to be a bug, and i am entering it as such in the amsmath bugs list.this (unwanted) result can be easily demonstrated by two additions to your test file:(1) replicate the (simple) example with the content of the first aligned duplicated, to give a two-line aligned;(2) replicate the same example replacing the first aligned element by