Question

A) Titan's exosphere lies nearly 1400 kilometers above its surface.

- What is the escape velocity from this altitude?

- What is the thermal speed of a hydrogen atom at the exospheric temperature of about 200 K?

B)

Io loses about a ton (1000 kilograms) of sulfur dioxide per second to Jupiter's magnetosphere. The mass of Io is 8.93×1022kg.

- At this rate, what fraction of its mass would Io lose in 5.1 billion years?

-Suppose sulfur dioxide currently makes up 1% of Io's mass. How long will it take Io to run out of this gas at the current loss rate?

Answer 1