Answer:
Perigee
Explanation:
In Perigee, The moon appears closer.
The reason why modelling is used in the study of earth science processes is further explained below
<h3>What is earth science?</h3>
Earth science is defined as the branch of science that deals with the geology, oceanology and meteorology aspects of life.
Because these fields covered by earth sciences is are often not visible, models are used for its study for better understanding.
Learn more about geology here:
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As you go from left to right and down to up on the periodic table, atomic radius decreases. This would make helium the smallest and francium the largest.
Acidity strength is determined by the ability of compound to donate H⁺
The easier it lose H⁺ the stronger will be the acid
also the more stable conjugate base formed the stronger will be the acid
So the arrangement will be:
Methane < Alcohol < Phenol < Carboxylic acid
because carboxylic anion (COO-) is more stable than phenoxide (Ph-O⁻) than alkoxide RO⁻ than CH₃⁻
Answer:
The thermal efficiency of an engine is 
that is 15%
Explanation:
Specific heat of a gas at constant volume is
here, 
degree of freedom
universal gas constant
Thermal efficiency of a cycle is
Gross heat absorbed is amount of heat that absorbed.
ω
Δ
ω
=
these 2 are not the part of gross heat
η
For monoatomic gas 
η
