C. Magma from venus mantle erupted as lava.
Explanation:
A volcano is a land form which results from the eruption of molten rocks (lava) on the surface. Volcanic rocks are a special type of igneous rock that forms when molten rock cools and solidifies on the surface.
For a planet like Venus which is presently not active and little to no movement occurs within the plates, the volcanisim must have occurred when the planet was relatively young and it must have been millions of years ago.
It is widely believed that Venus was geologically active in times past. Mantle generated lava must have solidified on the surface in times past to have formed the volcano.
Evaluating other options:
Impact of space objects on Venus would lead to the formation of a crater which is a depression on the surface. The rock would be mostly metamorphic.
If water was ever present in Venus, they would have produced sedimentary rocks instead. The erosive power of water is not high enough to cut through the crust. Also, water would not aid the formation of volcanoes.
Heat is not enough to from volcanoes. Other factors are also in play.
Answer:
weight = mg
= 2 X 9.8 (g = 9.8m/s^2)
= 19.6 N is the correct answer
K (Potassium) has higher molar entropy than sodium.
The substance's condition has the most impact on the molar entropy. Compounds that are gases will have a far higher molar entropy than compounds that are liquids or solids because gases are much more widely dispersed. A substance's entropy rises as its molecular weight, complexity, and temperature rise. As the pressure or concentration decreases, the entropy likewise rises. Gas entropies are significantly higher than those of condensed phases. The highest entropy is in gases. This is due to the wide variety of microstates in which gases can reside. The amount of freedom that atoms in a substance have to disperse, migrate, and organize themselves randomly is referred to as entropy.
Learn more about molar entropy here-
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