It has been a long time ago and have been granted full
I think to be
A
Answer:
Discovering that the sun is the center of the whole universe
Explanation:
Discovering that the sun was the center of the universe was the hardest and challenging task Galileo established. From all his observation, this one is the most challenging one.
Answer:
The minimum angle of incidence is, ∅ = 56° 18' 35'' to the normal
Explanation:
Given data,
The distance between the two plane mirror, d = 5 cm
The length of the plane mirror, L = 30 cm
According to the laws of reflection, the angle of incidence is equal to the angle of reflection.
If the laser beam touches each mirror only twice, then the base of the triangle formed is not less than L/2.
Let ∅ be the angle of incidence to the normal. The normal divides the triangle into two equal halves where base becomes L/4.
Therefore,
<em> tan ∅ = opp / adj</em>
= (L/4) / d
= (30/4) / 5
tan ∅ = 1.5
∅ = tan ⁻¹ (1.5)
= 56° 18' 35''
Hence, the minimum angle of incidence is, ∅ = 56° 18' 35'' to the normal.
<span> Newtons First Law is applied on my egg experiment because it will not move or change it's acceleration until a force acts upon it. In this case, one example of those forces would be Mr. Baker picking up the egg project. Newton's Second Law is applied because of the acceleration caused by natural forces as the egg is plummeting to the earth.</span>