Answer:
1225 J
Explanation:
The Gravitational potential energy (PEG) gained by a mass lifted above the ground is given by

where
m is the mass
g = 9.8 m/s^2 is the acceleration due to gravity
h is the height at which the object has been lifted
In this problem, we have
m = 250 kg
h = 0.5 m
So, the PE of the object is

Coals energy is affordable and it is easy to burn.
<span>Darlene jumps into a swimming pool. She is creating "Impact Waves." Impact waves are also referred as shock waves. It is a large-amplitude wave formed </span><span>by the sudden compression of the medium through which the </span>wave<span> moves.</span>
Answer:
Archaeologist use radioactive isotopes to determine the ages of various objects, rocks and materials. This is called radioactive dating. Radioactive isotope Carbon-14 is widely used for this dating process.
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