A 5000N block is lifted 1000cm. How much work was done?
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I guess the problem is asking for the distance between Earth and Mars in Astronomical Units (AU).
Since
and the distance between the two planets is
we can convert this distance into AU by using the following proportion:
from which we find
Since
and the distance between the two planets is
we can convert this distance into AU by using the following proportion:
from which we find
When light crosses the interface between a medium with higher refractive index and a medium with lower refractive index, there is a maximum value of the angle of incidence after which there is no refraction, but all the light is reflected, and this maximum value is called critical angle.
The critical angle is given by
where n1 is the refractive index of the first medium while n2 is the refractive index of the second medium. In our problem, n1=1.33 and n2=1.58, so the critical angle is
The critical angle is given by
where n1 is the refractive index of the first medium while n2 is the refractive index of the second medium. In our problem, n1=1.33 and n2=1.58, so the critical angle is