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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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
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
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
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).