Answer:
The most common of these is carbon 12, 13, 14. All of these isotopes have the same atomic number but different mass numbers. Carbon has the atomic number of 6 which means that all isotopes have the same proton number. However, the number of neutrons is different, thus giving different mass numbers.
Answer:
Zero
Explanation:
Momentum is the product of mass and velocity.
momentum = mv
For a system at rest, the velocity = 0
momentum = m*0
= 0
Even though the individual molecules in a system have some momentum, the system has no momentum because the system is at rest and is left standing.
Answer:
The strength of magnetic field is 0.25 T
Explanation:
Time period sec
Mass of proton kg
Charge of proton C
Here proton moves in circular path
Velocity of proton is given by,
Put the value of velocity in above equation,
Now magnetic field is given by,
T
Therefore, the strength of magnetic field is 0.25 T
It should be noted that after the big bang occurred, the universe "Became Denser" (Option B)
<h3>What is the explanation for this?</h3>
According to the Big Bang Theory, after the explosion which triggered the transformation of radiation into matter, gravity pulled dark matter together which in turn attracted normal matter.
Hence, it is right given the above analogy that the Universe became denser.
It should be mentioned that the big-bang hypothesis is a widely accepted account of the universe's evolution. Its defining characteristic is the universe's birth from a condition of great heat and density—the so-called big bang, which occurred 13.8 billion years ago.
Learn more about the Big Bang Theory:
brainly.com/question/24453703
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Answer:
what is speed
how to tell what speed an objeckt is moveing
vlocity
Explanation: