Which of the following statements is true of Nereid, Neptune's moon?
A) It is about 80 percent the size of Earth's moon.
B) It generates a magnetic field of its own.
C) It takes about an Earth year to circle Neptune once.
D) It follows a large, angular orbit.
C
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Uniform Circular Motion: You are driving at 30.0 m/s on a freeway curve of radius 25.0 m. What is the magnitude of your acceleration?
A. 36.0 m/s2 B. 1.20 m/s2 C. 20.8 m/s2 D. 0.833 m/s2
The tarp covering on a trailer or truck puffs upward for fast-moving vehicles, which illustrates
A) Pascal's principle. B) Archimedes' principle. C) the principle of continuity. D) Bernoulli's principle.
Suppose the surface temperature of the Sun were about 18,000 K, rather than 6,000 K. How would the thermal radiation spectrum of the Sun be different?
What will be an ideal response?
A steel alloy that has an initial carbon concentration of 0.1 weight %carbon is to be case-hardened by packing it in carbon that maintains a surface concentration of 1 weight %carbon at 1000°C. After 11.8 hours the carbon concentration is 0.5 weight % at a depth of 1 mm into the steel. What time is required to obtain a carbon concentration of 0.5 weight %at a depth of 2 mm into the steel?
What will be an ideal response?