A rocket with initial mass of 3.0 × 10^4 kg fires its engines at t = 0 . The exhaust speed of the rocket is 3.9 × 10^3 m/s. If the velocity of the rocket at t = 200 s is 1 500 m/s, how much fuel did it consume?
a. 9.6 × 10^3 kg
b. 3.0 × 10^4 kg
c. 4.4 × 10^4 kg
d. 4.8 × 10^3 kg
a
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In the UNS system of material designations, if an alloy designation starts with a “G”, it is a plain-carbon or low-alloy _________.
Fill in the blank(s) with the appropriate word(s).
In the atmospheres of the jovian planets, this component increases, systematically, with distance from the Sun
A) Hydrogen B) Helium C) Methane D) Ammonia E) Nitrogen
Three identical capacitors are connected in parallel to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry?
A) 9Q B) 3Q C) Q D) Q/3 E) Q/9
A helium-neon laser (? = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5°, what is the line spacing, d?
a. 1.81 × 10^?6 m b. 1.00 × 10^?5 m c. 1.00 × 10^?4 m d. 1.31 × 10^?6 m e. 6.76 × 10^?7 m