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Nikolay [14]
3 years ago
6

(Subject is Astronomy, but that's not an option.)

Physics
2 answers:
kaheart [24]3 years ago
7 0

Answer:

the answer is D

Explanation:

The astromerty instrument

jasenka [17]3 years ago
4 0

Answer:

Astrometry (D)

Explanation:

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We know that,ground speed is the vector sum of airspeed and cross wind speed and airspeed is perpendicular to cross wind speed.

If v_{1} and v_{2} are two perpendicular vectors,the resultant vector has the magnitude \sqrt{|v|_{1}^{2}+|v|_{2}^{2}}

Given,

v_{a}=40ms^{-1}\\v_{c}=30ms^{-1}

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