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(1)
(1)
3.1 Write down the number of the part that is associated
with...
a) supplying light.
b) moving the nosepiece up and down to obtain
focus initially.
c) keeping the microscope slide in place on the
stage.
d) clears up blurs
e) holds the slide in place
[5]
(1)
)​

If there were no force of gravity then the moon would tend to travel in a straight line. With gravity providing a centripetal force, that path is curved towards the Earth, resulting in a roughly circular orbit. In essence the moon is in continuous freefall towards the Earth.

Explanation:

The source for the centripetal force in the solar system is the gravitational force of the sun.