To answer the question would require knowledge of several variables that are not specified in the question - to wit:
Is "1 km" the diameter, radius, or circumference of the sphere?
What is the initial temperature of the sphere?
Is the sphere in contact with other matter or is it in a vacuum?
Is the sphere under pressure?
Does evaporation have to be accounted for?
If it is in contact with some other solid, liquid, gas, plasma, etc - what are the physical properties of the material(s) it is in contact with?
Is it radiating to a black body?
Is there any source of energy radiating back to the sphere?
Is the sphere in motion or stationary?
Is the sphere subject to any external fields such as magnetic fields?
I'm sure we could identify even more unspecified variables that would impact the answer, but the point is that the question cannot be answered without more information.
Smaller fragments of molten rock that solidify almost instantly are called "volcanic ash." These tiny particles are ejected during explosive volcanic eruptions and can vary in size, typically measuring less than 2 millimeters in diameter. Volcanic ash can travel long distances and can impact air quality, agriculture, and infrastructure.
The earth was in molten state for approximately 0.8-1 billion years.
One possible indicator that Earth is not a sphere is the perception that the horizon appears flat when observed from ground level over long distances. Additionally, some flat Earth proponents argue that lack of noticeable curvature in the horizon suggests a non-spherical Earth.
The mesosphere is solid rock because it is located deeper in the Earth where the pressure and temperature are high enough to solidify the rock. The asthenosphere is softer because it is partially molten, allowing the rock to flow and deform over long periods of time due to the heat and pressure within the Earth's mantle.
The largest constellation on the celestial sphere is Hydra the Sea Serpent and it is 100° long.
Smaller fragments of molten rock that solidify almost instantly are called "volcanic ash." These tiny particles are ejected during explosive volcanic eruptions and can vary in size, typically measuring less than 2 millimeters in diameter. Volcanic ash can travel long distances and can impact air quality, agriculture, and infrastructure.
Freezing molten gold depends on several factors, including its initial temperature and quantity. Typically, gold freezes at around 1,948 degrees Fahrenheit (1,064 degrees Celsius). The time required varies, but in a controlled environment, it may take a few minutes to solidify smaller amounts, while larger quantities could take longer, possibly up to an hour or more. The use of specialized equipment and cooling techniques can expedite the process.
The center core of the earth is solid iron surrounded by molten iron. The center is solid due to the great pressure and the spinning mass of molten iron around the solid iron core creates the electrodynamic effect that causes Earths magnetism. Our moon has little or no magnetic field because its core has long since cooled.
It typically takes a few hours to produce iron in a blast furnace. The process involves loading the furnace with iron ore, coke, and limestone, heating it to high temperatures, and allowing the molten iron to collect at the bottom of the furnace. Once the iron is ready, it can be tapped and further processed into various forms.
Due to the fact that the zinc and chromium are corrosion resistant,they ll be a coat to protect the materials made from iron,which ll rust after long time used. So,when the iron is dipped in molten zinc,the process is called galvanizing. Thanks.by the way,my english is not my mother tongue.
The earth was in molten state for approximately 0.8-1 billion years.
Chocolate typically takes about 1-2 hours to freeze and solidify completely, depending on the thickness of the chocolate and the temperature of the freezer.
One possible indicator that Earth is not a sphere is the perception that the horizon appears flat when observed from ground level over long distances. Additionally, some flat Earth proponents argue that lack of noticeable curvature in the horizon suggests a non-spherical Earth.
Because "molten iron, moving very fast, does in fact produce a magnetic field". Even if that iron isn't molten moving a solid conductor, such as copper, fast will still produce a magnetic field. Crude electromagnet experiments, such as those spun by hand, are evidence of that fact. If the Earth's outer core was "dead" (solidified) as it is on the Moon, and Mars (to a lesser degree), we wouldn't have that field and the atmosphere would have been long ago fried away by the solar winds.
as long as you have enough play-dough in your special bucket to keep the sphere nice and snuggly warm...
No. The molten rock which once constituted the moon was long ago solidified from cooling into igneous rock.
The mesosphere is solid rock because it is located deeper in the Earth where the pressure and temperature are high enough to solidify the rock. The asthenosphere is softer because it is partially molten, allowing the rock to flow and deform over long periods of time due to the heat and pressure within the Earth's mantle.