the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. This process changes the atom to a different element or a different isotope.
There 2 forces acting in oppisite derections on a object
Explanation:
Given parameters:
Displacement = 80m
Unknown:
Displacement eastward = ?
Solution:
Displacement is the distance traveled in a specific direction.
To find the distance traveled eastward, we need to find the horizontal component of his displacement using the cosine rule:
Cos Ф = 
The unknown is the adjacent;
Adjacent = hypotenuse CosФ = 80 cos 45 = 56.57m
His displacement is 56.57m due east
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Windmills run on the principle of mechanical energy and work. Moving air (wind) possesses some amount of energy in the form of kinetic energy (due to motion). This energy gives the air the ability to do work on the blades of the fan.