Posted by **Me** on Saturday, November 26, 2011 at 1:02am.

You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 2.070E+7 m and its rotation to be 19.8 hours. You have previously determined that the planet orbits 1.590E+11 m from its star with a period of 368.0 Earth days. Once on the surface you find that the free-fall acceleration is 13.00 m/s2. What is the mass of the planet (in kg)?

What is the mass of the star (in kg)?

- Physics help please -
**drwls**, Saturday, November 26, 2011 at 1:31am
G*Mp/R^2 = 13.00 m/s^2

G = 6.67*10^-11 N*m^2/kg^2

Solve for the planet mass, Mp.

The mass of the star can be deduced from Kepler's Third Law, using the period and radius of the orbit.

For the formula, see

http://spiff.rit.edu/classes/phys440/lectures/kepler3/kepler3.html

You do not need to use the period of rotation.

## Answer This Question

## Related Questions

- Physics help please - You are the science officer on a visit to a distant solar ...
- Physics - I can not figure this out. You are the science officer on a visit to a...
- Physics please help! - You are the science officer on a visit to a distant solar...
- physics - Suppose a driver's car needs to travel 46.4 miles in 1.000 hour at a ...
- physics - An astronaut exploring a distant solar system lands on an unnamed ...
- Physics - An astronaut exploring a distant solar system lands on an unnamed ...
- Science question - for my science project I have to chose a planet that I would ...
- physics - On a distant planet, golf is just as popular as it is on earth. A ...
- Physics - On a distant planet, golf is just as popular as it is on earth. A ...
- astronomy/physics - If the Solar System had formed right after the Big Bang, it ...

More Related Questions