Ajet left paris at the same time as a
passenger plane. the planes flew in
opposite direc...
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Mathematics, 06.01.2020 23:31 carlinryan
Ajet left paris at the same time as a
passenger plane. the planes flew in
opposite directions. the passenger plane
flew at a speed of 450 mph. after 11 hours
they were 9460 mi. apart. how fast did the
jet fly?
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Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
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