Why are Earths and super-Earths in the habitable zones of their stars of special interest?
What will be an ideal response?
One of the major motivations for searching for exoplanets has been to find planets that harbor life. Life-as-we-know-it requires liquid water and planets in the habitable zones could have liquid water. Adding that to rocky or terrestrial planets, there is hope that life would have developed the same way on these planets.
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The ______________ angle is measured between the horizon and the line of sight to the object
a. declination b. altitude c. inclination d. zenith
A method for identifying a black hole is to:
A) look for voids in the star fields. B) look for their effects on nearby companions. C) locate a visible star that disappears when the black hole passes in front of it. D) search for radio waves from the accretion disk. E) search for their pulsar signal.
Thermodynamic Processes: The figure shows a pV diagram for 0.98 mol of ideal gas that undergoes the process 1 ? 2. The gas then undergoes an isochoric heating from point 2 until the pressure is restored to the value it had at point 1. What is the final temperature of the gas? (R = 8.31 J/mol ? K).
A. -160°C B. 12°C C. 380°C D. 110°C
A ball is thrown upward and caught when it returns. Compared with its initial speed and in the presence of air resistance, the speed with which it is caught is
A) more. B) less. C) the same. D) need more information.