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What would happen if Earth were suddenly replaced by an equal volume of blueberry jam?
If Earth were suddenly replaced by an equal volume of blueberry jam, it would instantly collapse under its own gravity. The internal air would compress, heating the core to thousands of degrees and creating a boiling, pressurized sphere of hot jelly. Because jam is much less dense than rock, the new planet would have significantly weaker gravity, causing the Moon to shift into a wide, eccentric orbit.
If Earth were shaped like a giant cube, would the oceans pool into six massive central lakes?
If Earth were a cube, gravity would pull all water and air toward the center of each face, as those points are closest to the center of mass. This would create six isolated circular oceans surrounded by massive, airless mountain ranges at the edges and corners.
If you released a helium balloon on the Moon, would it float away or fall to the ground?
A helium balloon would fall to the lunar surface. Because the Moon lacks an atmosphere, there is no air to provide the buoyancy required for a balloon to float. Instead, gravity pulls the balloon downward, though it falls much slower than it would on Earth.
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Could you actually walk on the surface of a liquid mercury pool without sinking?
Yes, you can walk on liquid mercury because its extreme density makes you highly buoyant, causing you to sink only a few inches. However, the surface is incredibly slippery and the toxic fumes pose a severe health risk.
Could you fly on Saturn’s moon Titan by simply strapping wings to your arms and flapping?
Yes, humans could fly on Titan by flapping wings attached to their arms. Because the moon has very low gravity and an extremely dense atmosphere, the physical effort required to generate lift is low enough that human muscle power would be sufficient to achieve flight.
If you dumped an Earth-sized volume of water onto the Sun, would it extinguish or burn even brighter?
Adding an Earth-sized volume of water would make the Sun burn brighter rather than extinguish it. Since the Sun is powered by nuclear fusion instead of chemical combustion, the extra mass increases gravitational pressure, accelerating the fusion process and making the star hotter and more luminous.
What would happen to Earth if a microscopic black hole with the mass of Mount Everest passed through it?
A microscopic black hole with the mass of Mount Everest would be smaller than an atom and travel at hyper-velocity. It would zip through the planet in minutes, leaving a needle-thin trail of radiation and triggering worldwide seismic tremors, but Earth would ultimately survive with minimal overall damage due to the object's tiny physical footprint.