I think it’s b... not sure tho sorry
Answer: It does not include alpha rays
Explanation: It does not include alpha rays
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please vote my answer brainliest. thanks!
Answer : The acceleration of the elevator is, 
Explanation :
Formula used to calculate the acceleration of the elevator is:

where,
F = force = 844 M
m = mass of man = 70 kg
g = acceleration due to gravity = 
a = acceleration of the elevator = ?
Now put all the given values in the above formula, we get:



Thus, the acceleration of the elevator is, 
Gravity, which acts downward on the object and its buoyant force that acts upwards and is dependent on weight of the volume of water displaced by the object.