At liftoff, the engines of the Saturn V rocket consumed 14,000 kg/s of fuel and exhausted the combustion products at 2900 m/s. What was the total upward force (thrust) provided by the engines?
a. 3.77 × 10^7 N
c. 1.47 × 10^8 N
b. 7.54 × 10^7 N
d. 4.06 × 10^7 N
D
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The Hubble Telescope gets much clearer images of astronomical objects than ground-based telescopes because it has a much larger mirror than ground-based telescopes.
Answer the following statement true (T) or false (F)
The event that changes a protostar to a full-fledged star is
A) gravitational collapse. B) gravitational expansion. C) thermonuclear fusion. D) the emission of light. E) a catastrophic increase in temperature.
U-235 and Pu-239 are both
A) radioactive isotopes. B) fissionable isotopes. C) heavier than lead. D) all of the above E) none of the above
A copper sphere, 10 cm in diameter, is subjected to a pressure of 1.0 × 106 N/m2. What is the change in the diameter of the sphere? The bulk modulus for copper is 1.4 × 1010 N/m2
A) 2.2 × 10-6 m B) 2.2 × 10-7 m C) 7.1 × 10-6 m D) 7.1 × 10-7 m E) 7.1 × 10-8 m