The correct answer is #4. They have the same number of protons but a different number of neutrons.
Answer:
First option, third option, fourth option, and the fifth option.
Explanation:
Kinetic energy is energy an object has when it's motion, the greater the speed the greater the kinetic energy. For example, a car moving and increasing in speed is kinetic energy since the object is in motion. If the car stops and parks in a parking lot that is potential energy. Potential energy is the amount of energy an object has when it's at rest or not in motion.
So, the answer for this question is as followed first option or "energy can be stored in the position of an object." Third option or "Energy can be stored in the position of the particles that make up a substance." Fourth option or "Energy exists as movement of the particles of a substance." The last answer will be the fifth option or "Energy is greater in faster-moving particles than in slower-moving particles."
Hope this helps.
Answer:
The recoil speed is 
Solution:
Wavelength of a blue-green photon, 
Now, the energy associated with the blue-green photon:

where
h = Planck's constant
C = speed of light ion vacuum


Also, we know that the recoil speed can be calculated by the KInetic energy which is equal to the Energy of the blue-green photon:

where
= velocity of Hydrogen atom
= mass of H-atom
Now,



Answer:
Explanation:
Given
for 
Sphere are 
when sphere
apart suppose deflection is 
We know

Where F=force between charged particle
Deflection


thus 
for 



(b)for
deflection Potential 
Electric Potential is 

where V=voltage
k=constant
r=distance between charges
Put value of Q in equation 1


thus 
therefore



Choice (3) would be one of the objects because when its stretching its waiting to release the energy. Then choice (1) would be the other object because when it rolls the energy stored in the ball would be released when stopped. Therefore there storing the energy until released.