3 years ago

Which igneous rock forms when basaltic lava hardens

1 answer:

5 0

The answer is; Basalt rock

This type of rock is dark-colored due to the high content of magnesium and iron from the lava that forms it. Extrusive basalt rocks are fine-grained due to the rapid cooling of lava on the earth's surface. The basaltic lava is usually of low viscosity to the low silica content. Therefore , this lava flows greater distances before cooling. Basalt comprises approximately 90% of volcanic rocks on earth.

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The 'G' in the universal gravitation formula

shutvik [7]

b. Gravitational constant

Explanation:

G in the universal gravitation formula represents the gravitation constant. It's value is 2.071×10⁻⁴³ s²⋅m⁻¹⋅kg⁻¹.

The law of universal gravitation states that "the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them".

Mathematically, the law is expressed as:

F = G $\frac{m_{1} m_{2} }{r^{2} }$