The correct answer is B because isotopes have different numbers of neutrons, and neutrons are located in the nucleus
Hope this helps
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When the force of air resistance on the skydiver
is equal to the skydiver's weight.
Answer:


Explanation:
Given:
Let mass of the particle B be, 
then the mass of particle A, 
Energy stored in the compressed spring, 
Now when the compression of the particles with the spring is released, the spring potential energy must get converted into the kinetic energy of the particles and their momentum must be conserved.
Kinetic energy:

.............................(1)
<u>Using the conservation of linear momentum:</u>

.............................(2)
Put the value of
from eq. (2) into eq. (1)

...........................(3)
<u>Now the kinetic energy of particle B:</u>



Put the value of
form eq. (3) into eq. (1):

<u>Now the kinetic energy of particle A:</u>
<u />
<u />
<u />
<u />
