Comets are icy bodies because they originate in areas beyond Neptune.
Option a
<u>Explanation:</u>
Comets are icy, “small solar system” bodies that, warms up and begins to release gases or dust when it passes close to the Sun. The nucleus of a comet is made up of an combination of rock, dust, water ice, and frozen carbon dioxide, carbon monoxide, methane, and ammonia while the surface of the nucleus is generally dry, dusty or rocky.
They are often called as dirty snowballs because of their physical appearance and due to the fact that these Short-period comets originate in the Kuiper belt that lies beyond the orbit of Neptune. Comets have an icy body because they originate from a disk-shaped band of icy objects known as the “Kuiper Belt” that lies just “beyond Neptune's orbit”, with gravitational interactions with the outer planets dragging these bodies inward.
Answer:
The binding energy of a mole of the nuclei is 252KJ
Explanation:
The binding energy is the amount of energy required to separate an atom into its nuclei.
From Einstein's relations,
E = Δm
where E is the energy, Δm is the mass defect and c is the speed.
The mole of nuclei moves with the speed of light, so that;
c = 3.0 × 
m/s
Given that Δm = 0.00084Kg/mol, the binding energy is calculated as;
E = 0.00084 × 3.0 ×
= 252000
= 252KJ
The binding energy of a mole of the nuclei is 252KJ.
Answer:
If mass increases, force increases.
Explanation:
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In which season is the sun closest to the earth?Answer Summer
Answer:
The homologous chromosomes form fairs.
