Author Question: A rocket with an initial mass of 1000 kg adjusts its thrust by varying the rate at which mass is ... (Read 172 times)

MGLQZ · **on:** Jul 28, 2018

A rocket with an initial mass of 1000 kg adjusts its thrust by varying the rate at which mass is ejected. The ejection speed relative to the rocket is 40 km/s. If the acceleration of the rocket is to have a magnitude of 20 m/s2 at an instant when its mass is 80 of the original mass, at what rate is mass being ejected at that instant? Ignore any external forces on the rocket.
a. 0.40 kg/s
b. 0.50 kg/s
c. 0.60 kg/s
d. 0.70 kg/s
e. 0.80 kg/s

Question 2

A saturated hydrocarbon that is made up of eight
carbon atoms and eighteen hydrogen atoms is
named
a) octane.
b) butane.
c) methane.
d) ethane.