1.25m/s'2 by the first eq of motion
see the steps below
Acceleration is a change in velocity, either an increase in speed or a change in direction. Acceleration measures the rate of change of an object's velocity. Average acceleration is calculated by dividing the change in velocity over the time.
Hello!
each element atom has a certain number of protons, which weigh 1 AMU, but the same element can have a different number of neutrons (weighing 1 AMU), which results in what is called an isotope
Normally, the atoms contain the same amount on neutrons. However, sometimes they gain more neutrons, which increases the atomic mass by 1 AMU for each additional proton.
I hope this helps, and have a nice day!