Consider a generic Jovian planet with a cloud-top "surface" temperature of 85 K and an escape speed of 35 km/s. Assuming that the planet was not any hotter in the past, calculate if its atmosphere contains significant amounts of:.
A. Hydrogen Gas (H2).
B. Helium Gas (He).

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Where is the world’s shortest commercial runway?

Which of these has the least impact on the climate of a place