Physics  Astronomy
posted by Leslie .
What (decimal) fraction of a hypothetical spherical planet's volume does a planetary core with a radius of 70% of that planet's radius have? Round off answer to three decimal places. [Hint: the volume of a sphere is equal to 4/3 pi times the radius cubed]

(0.7)^3 = 0.343
Respond to this Question
Similar Questions

Physical Science
The radius of a certain planet is 6.04x10^7 meters, and its mass is 5.19x10^26 kg. Find the density of this planet. (The volume of a sphere is given by (4/3)(pie)(r^3). Answer in units of grams/cm^3 
physics
An object rests on the surface of planet y. Its mass is unknown. Find the acceleration due to gravity near the surface of planet y. Answer in m/s/s. G=6.673x10^23 radius of planet y=2439700m mass of planet y=3.302x10^23kg radius of … 
physics....
Spherical planet A has mass m and radius r. Spherical planet B has mass and ￼ radius 2r. How does the gravitational field strength at the surface of planet B compare to the gravitational field strength at the surface of planet … 
Physics
Astronomers can calculate the mass of a planet by using the orbital parameters of one of its moons. Consider a hypothetical planet, which has a hypothetical moon that orbits the planet in a roughly circular orbit with a radius of 3.95*10^8 … 
astronomy
Rank the following hypothetical planets  all of which have the same total mass and same radius  from lowest moment of inertia to highest moment of inertia: 1) A uniform sphere of mixed up rock and iron 2) A rocky planet with an … 
Astronomy
Rank the following hypothetical planets  all of which have the same total mass and same radius  from lowest moment of inertia to highest moment of inertia: 1) A uniform sphere of mixed up rock and iron 2) A hollow sphere 3) A rocky … 
Math
What is the approximate volume of a sphere with a radius of 7.16 cm? 
physics
Calculate the capacitance of a planet, assuming it is a spherical capacitor of radius R = 9050.0 km with charge distributed throughout the volume of the sphere. 
math
A sphere of radius 7 m is circumscribed about a regular triangular prism. If the base edge of the prism is 1 m, find the volume of the prism (in m3). Round off your answer to four decimal places. 
Math
If an object which weighs 100 lbs on the Earth's surface were placed on a planet with 2 times the radius of the Earth and with 7 times the Earth's mass, how much would that object weigh?