Purchase Solution

Calculating the ratio of the radii of two planets

Not what you're looking for?

Ask Custom Question

The weight of a object is the same on two different planets. The mass of planet A is only sixty percent that of planet B. Find ra/rb, which is the ratio of the radii of the planets.

Purchase this Solution

Solution Summary

We calculate the ratio of the radii of the two planets. If one of the radii is known, then the radius of the other planet can be calculated.

Solution Preview

If g_a is the acceleration due to gravity on planet A, then its radius ra and g_a are related as,

g_a = G (M_a)/(ra)^2 ....(1) where M_a is the mass of the planet.

Similarly, g_b = G (M_b)/(rb)^2 ...

Purchase this Solution


Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.