Which of the following are true about the seti program?
a. the seti program is pseudoscience.
b. the seti program is concerned with looking for intelligent life outside of earth. c. the seti program is interested in establishing a permanent base on mars. d. the seti program uses radio telescopes to "listen" for radio signals from space.

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i. e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

8. what happens to matter during a chemical reaction