The polar ice capes, the change in genetics of certain animal fossils (growing more or less hair, etc. etc.)
1. Waves hitting at an angle and then bending around features of the coast is known as wave refraction.
2. Landforms associated with longshore drift form where the sediment is plentiful enough to create them.
3. When there is longshore drift, the overall direction of sand transport is parallel to the coast..
4. In order to produce longshore drift, the direction of waves must not be perpendicular to the coast.
5. A baymouth bar forms when longshore drift creates a ridge of sand separating a waterway from the ocean.
6. The direction that sediment is traveling along a coast is called the downstream direction.
Explanation:
Waves forms different kinds of land form in the coastal areas. Waves hit coast in a particular angle It is known as wave refraction. When sediments get deposited in the coastal areas and forms a bar which get detached from the shore is called long shore bar.
To create long shore drift the direction of wind should not be perpendiular to the coast. Direction will be parallel. A baymouth bar is formed when a ridge of sand is created and separates the waterway from ocean. Sediments travel along the coast in downstream direction.
Answer:
The age of the rock = 2800.6 million years = 2.8 billion years.
A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.
Explanation:
Half life of Uranium-235 = 700 million years (from literature)
The decay of radioactive substances follow first order reaction kinetics.
The general equation is given as
A(t) = A₀ e⁻ᵏᵗ
A(t) = Amount of radioactive substance left after a particular time = 6.25%
A₀ = initial amount of radioactive substance = 100%
t = time that has passed since the beginning = age of the rock = ?
k = decay constant
The decay constant is related to the half life (T) through the relation,
k = (In 2)/T
k = (0.693/700) = 0.00099 /million years
A(t) = A₀ e⁻ᵏᵗ
6.25 = 100 e⁻ᵏᵗ
0.0625 = e⁻ᵏᵗ
In e⁻ᵏᵗ = In 0.0625 = -2.7726
-kt = - 2.7726
t = (2.7726/0.00099) = 2800.6 million years
t = 2.8 billion years.
Hope this Helps!!!
<u>Answer:</u>
<em>Rigel and Betelgeuse </em>
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<u>Explanation:</u>
Rigel and Betelgeuse are counted in the brightest stars of the galaxy.
They form a pair in the Orion constellation.
The Rigel star is situated near the Equator. This star is invisible in the region around and above of latitude 82°N and can be seen from any part of the world. It is a blue white giant star. This makes Rigel helpful in navigation.
Betelgeuse is a red giant star which is visible from naked eye. It has the same diameter as that of Jupiter.
depends on the plant, most likley C
