To solve this problem we will use the concept related to electrons in a box which determines the energy of an electron in that state.
Mathematically this expression is given by,
Where,
m = mass of an electron
h = Planck's constant
n = is the integer number of the eigenstate
L = Quantum well width
The change in energy must be given in state 1 and 2, therefore
Replacing we have:
Therefore the correct answer is C.
Most fish fossils are: <u>D. from sharks, eels, and stingrays</u>.
<u>Explanation</u>:
A fossil is a preserved part or trace of a living being in the geological age. Animals, fish, bones and shells are some of the fossils. Fish fossils are the dead fish that are found under the river bed or ocean.
The dead animals in the water bodies are buried under the mud for long period of time. The soft tissues of the animals are decomposed leaving the dry bones.
There are five different types of fossils. They are
i) Body fossils
ii) Molds and casts
iii) Petrification fossils
iv) Footprints and trackways
v) Coprolites
One of the common fossils is shark tooth. The tooth of the sharks is shed continuously. The fish fossils are found at the bottom of the ocean, lake and pond deposits.
Answer:
Angular acceleration is defined as the rate of change of angular velocity of a body.
consider the attached figure as shown
It rotates with an angular velocity 
An point inside the object rotates along the path as indicated thus turning by an angle 
in time 't'
Thus we have
physically angular acceleration can be understood as the rate at which the angular speed of any object is changing with time.
Answer:
Using simple mechanics its D thats because A wouldn't make sense at all and C wouldn't be related, D might be.
So we're left with B and D. So B is wrong becuase that wouldn't affect the shape it depends on how it was created and how much interaction with other galaxies have made (gravity w/ mass). So if you understand Stephen Hawking he said that nature is not perfect and can change. The masses can change and can be collided therefore the answer is:
<h2><u>
D</u></h2>
