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Answer:
1.
Nearly all helium on Earth is a result of radioactive decay. The decay product is primarily found in minerals of uranium and thorium.
In what is called radioactive emission of "alpha particles" the atom of, say uranium, spits out particles in the form of two protons and two neutrons--a helium nucleus.
2.Helium is obtained through natural gas as it is extracted from the ground. The helium is a result of the decay of thorium and uranium. As these elements decay, they release an alpha particle. That alpha particle is the nucleus of a helium atom.
3.Natural gas is separated into its major components through a distillation process known as fractional distillation. Sometimes this name is shortened to fractionation, and the vertical structures used to perform this separation are called fractionating columns. In the fractional distillation process, the nitrogen and methane are separated in two stages, leaving a mixture of gases containing a high percentage of helium. At each stage the level of concentration, or fraction, of each component is increased until the separation is complete.
Explanation:
Answer: Bones cells secrete an extracellular matrix that when combined with minerals becomes rock hard.
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Answer:
Virtually all non-tasters (dd) cannot taste PTC, while homozygous tasters (TT) occasionally report an inability or weak ability to taste the chemical. The heterozygous genotype (Tt) has the "leakiest" phenotype as reduced or absent tasting ability is relatively common. This is formally called a heterozygous effect.
Explanation:
How much g force is keeping in sustained in its current preassure