An unfueled 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s "burn.". If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
a. 1.1 × 10^5 kg·m/s b. 1.6 × 10^5 kg·m/s
c. 1.5 × 10^5 kg·m/s d. 1.9 × 10^5 kg·m/s
b
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Schwarzschild showed how the _______________ of the event horizon depends only on the mass of the black hole
Fill in the blank(s) with correct word
"I live 20 minutes from Center City." How is this statement similar to giving astronomical distances in light-years?
What will be an ideal response?
The percentage of 235U, as a fraction of the total uranium content, present in natural uranium is closest to
A) 5 percent. B) 50 percent. C) 1 percent. D) 20 percent. E) 99 percent.
A stratified liquid flows in an 80-cm-wide, 40-cm-high channel with the density distribution ? (y) = 800(1+ 0.2y) kg/m3 and a uniform velocity distribution of 1.2 m/s, with y measured from the bottom of the channel. The mass flux is nearest:
A) 260 kg/s (B) 280 kg/s (C) 300 kg/s (D) 320 kg/s