When a skydiver jumps out of an airplane, the force of gravity is larger than air resistance. So the skydriver accelerates as he falls. Air resistance force increases with speed. When the sky driver achieve terminal velocity, the force of gravity equals air resistance.
It is a gemstone that is found on the African continents and is made pos the silica materials and has compounds of the aluminum and iron and the potassium lithium and the sodium and this is classified as a semi-precious stone. The metamorphic rocks and the sandstone consists of these minerals and the colors of the gemstone cane alter by the heat treatment.
