What is a species worth? How do we balance economics and ethics? Are there values other than economic that are important? Explain
What will be an ideal response?
It is clear that computer technology is of little help to an illiterate society, whether
agricultural or industrial. The technology used must be at least somewhat suited to the
sophistication of the people who will be using it. The agricultural technology that can be
accepted in most less developed countries is on the level of horse and plow, simple
mechanical reaper technology. For industrial technology, machines that are understandable,
and not microminiaturized should be appropriate. This issue was also discussed in Chapter
23, especially with regard to agricultural technology.
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The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon
Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the period of revolution of Phobos to that of Deimos? A) 0.2528 B) 0.3998 C) 1.582 D) 2.858 E) 3.956
Advantages of radio astronomy include
A) radio waves are not scattered or deflected by Earth's atmosphere. B) radio observations can be made even when the Sun is in the sky. C) radio observations can be made even when the sky is obscured by clouds. D) radio observations let astronomers study things that emit little visible light. E) all of the above.
A singly charged 9Be ion is accelerated from rest through a potential difference of 8000 V. The ion is then sent into a mass spectrometer where the radius of the path is 29 cm. What is the magnetic field in the spectrometer?
A. 0.27 T B. 0.13 T C. 0.067 T D. 0.0028 T E. 0.00019 T
A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP. Which statements are true about these molecules? (There could be more than one correct choice.)
A) Both gases have the same average molecular speeds. B) Both gases have the same number of molecules. C) Both gases have the same average kinetic energy per molecule. D) Both gases have the same average momentum per molecule.