I think they said 11 or 12. More than 11 or 12, I should think. I remember from an episode of Tennessee Tuxedo that about 50 of Luna (earth's moon) would fit inside a hollow earth, and I think Pluto is smaller than earth's moon.
You already stated in the question that it has 3.4 times the gravity of Earth.
The radius of Uranus is roughly 4 times the radius of Earth. However, in volume, it would be around 43=64 times larger than Earth. Hence, There is no planet in our solar system which is four times the size of the Earth.
That would depend on the planet's radius. The strength of gravity depends on both the mass of the object in question and the distance from its center of mass. If the planet in question had the same radius as Earth, then the person would weigh 200 lbs as gravity would be twice as strong. If the planet had the same density as Earth it would have 1.26 times Earth's radius and gravity would be 1.26 times as strong and the person would weigh 126 lbs. If the planet had about 1.41 times Earth's radius then that person's would weight 100 lbs.
1000,0000,00000,00000,00000,000000,00000 times as much you would weigh on planet earth
If you mean in diameter, I don't think there is such a planet. 700 times as big as the Earth would be about 7 times as large as our Sun.The question must mean "by volume". The answer then is Saturn.
You would weigh 1/64 your weight on Earth. Gravitational acceleration is directly proportional to the mass of the object and inversely proportional to the square of the distance from the center. On a planet 8 times Earth's radius you would be 8 times farther away from the center and 8^2=64.
The Earth is not hollow; so No.Were the Earth hollow, it might be difficult to control the buoyancy of the hot air balloon sufficiently to enter a hollow Earth at the poles.
Jupiter is the largest planet of our solar system, as such any other planet would fit within Jupiter if it was hollow.
You could fit just under 18 of the planet mercury inside of the planet earth. Another way to say this would be: Mercury is 18 times smaller than earth.
That would be Venus.
If it is a rocky planet with a large iron core, Gliese 581c has a radius approximately 50% larger than that of Earth. Gravity on such a planet's surface would be approximately 2.24 times as strong as on Earth. If Gliese 581 c is an icy and/or watery planet, its radius would be less than 2 times that of Earth, even with a very large outer hydrosphere. Gravity on the surface of such an icy and/or watery planet would be at least 1.25 times as strong as on Earth.