The largest share of renewable energy in the U.S. comes from
a. wind b. natural gas c. hydro d. petroleum e. radiant solar
c
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A person is declared to be dead upon the irreversible cessation of spontaneous body functions: brain activity, or blood circulation and respiration. However, only about 1% of a person's cells have to die in order for all of these things to happen. How can someone be dead when 99% of his or her cells are still alive?
What will be an ideal response?
If kinetic energy is desired, the variable ? in would be represented by:
In the critical density universe now proposed, the ratio of dark energy to matter is about:
A) 1 to 100. B) 1 to 1. C) 3 to 1. D) 10 to 1. E) 1 to 5.
Which of the following is true about low-mass stars compared to high-mass stars?
A) Low-mass stars are cooler and less luminous than high-mass stars. B) Low-mass stars are hotter and more luminous than high-mass stars. C) Low-mass stars are cooler but more luminous than high-mass stars. D) Low-mass stars are hotter but less luminous than high-mass stars. E) Low-mass stars have the same temperature and luminosity as high-mass stars.