(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

18. If the moon were four times the distance from the Earth than it currently is, the amount of time it would take to go around the Earth would be roughly (the current orbital period of the moon is about four weeks)

A. 8 weeks

B. 11 Weeks

C. 16 Weeks

D. 32 Weeks

E. 64 Weeks

2. Relevant equations

T is directly proportional to (r)^3/2

3. The attempt at a solution

I absolutely am awful at problems that deal strictly with proportions.

T = (4)^(3/2)

(4)^(3/2) = 8 weeks

Since the coefficient in front of "T" is "one," should I multiply four by eight since the problem states the period of the moon is about four weeks long?

Also, is there a maximum number of times a person can post in one day? I feel like I post a lot.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Proportion Problem Dealing with Moon's Period

**Physics Forums | Science Articles, Homework Help, Discussion**