Physics, 21.09.2019 22:30 angelinaranee15
Arocket accelerates by burning its onboard fuel, so its mass decreases with time. suppose the initial mass of the rocket at liftoff (including the fuel) is m, the fuel is consumed at rate r, and the exhaust gasses are ejected with constant velocity v, (relative to the rocket) a model for the velocity of the rocket at time t is given by v(t)=-gt-v ln(m-rt/m) where g is the acceleration due to gravity and t is not to large. if g=9.8m/s^2 m=28,000 kg, r=190 kg/s, and v=3,100 m/s. find the height of the rocket one minute after lift off. (round answer to nearest whole meter)
Answers: 1
Physics, 21.06.2019 23:30
Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?
Answers: 3
Physics, 22.06.2019 07:50
2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it
Answers: 1
Arocket accelerates by burning its onboard fuel, so its mass decreases with time. suppose the initia...
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