The angle of depression between the bird and the birdwatcher is 61.32°
In the question, it is said that the distance between two birds is 17.8ft and the distance between the first bird and the birdwatcher is 37.4ft. So, when we draw an image in our mind then we can say that this whole system forms a right-angle triangle with a base of 17.8ft and a hypotenuse of 37.4ft. As we know that to calculate the angle of depression we will use trigonometric equations here i.e.,
cos x = Base/Hypotenuse
cos x = 17.8 / 37.4
cos x = 0.48
x = cos⁻¹(0.48)
x = 61.32°
Thus, the angle of depression is 61.32°.
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Answer:
(a) The resistance of 25m of wire is 3 ohms
(b) the length of this wire that has resistance 22 ohms is 183.33 m
Explanation:
Given;
resistivity of the wire, ρ = 0.12 ohms per meter
(a) The resistance of 25m of wire is calculated as follows;
(b) the length of this wire that has resistance 22 ohms is calculated as;