Under what circumstances is population growth "sustainable"? Discuss what sustainable means and attempt to apply your definition to Earth's human population
What will be an ideal response?
Sustainable means that the ecosystem produces more than is being used. As long
as there is an underexploited niche, growth can be sustained. It is the existence of limits (the
finiteness of resources) that makes population growth ultimately unsustainable.
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The interior of Jupiter is mostly liquid helium
a. True b. False Indicate whether the statement is true or false
Before the Planck time of 10-43 seconds, the Big Bang must be treated as a singularity, with even general relativity yielding no information about it
Indicate whether the statement is true or false
Electrons emitted when light strikes the surface of a metal is
a. photon emission. b. photon absorption. c. the photoelectric effect. d. a laser. e. an emission spectrum.
A visual binary star system has rotation period, P = 10 years. The semi-major axis of the orbit of one of the stars is 5 AU. What is the combined mass of the binary star system?
A. 40 solar masses B. 0.4 solar masses C. 8 solar masses D. 4 solar masses E. 200 solar masses