0.5x10 = 05
1. Fill in each gap with an appropriate word.
We know that all species are important for the (a) of ecological balance. If we (b).
one, the
whole natural environment (c)
With a view to (d) the environment from being spoilt, we
should therefore protect (e) wildlife. The good news is that many countries have (1)
action to
protect their (9)
wildlife. We should (h)
the security of the earth's wild (i).
to save
ourselves. So we must have (1) to animals.
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Answer:
Gravitational energy
EXAMPLES
U=m g h
U = gravitational energy
m = mass
g = gravitational field
h = height
FROM THE WEB
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in
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