What are 3 ways objects can be grouped based on how much light they let shine/pass through them.
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Ответ:
Transparent = lets light pass through without significant interference
Translucent = lets light pass through with significant interference
Opaque = Doesn't let light pass, instead absorbs it
Ответ:
D. 825 km/hr westward
Explanation:
In order to solve the problem, we should define a positive and a negative direction for the velocities.
Let's take positive (+) as westward and negative (-) as eastward.
1) Relative to the ground, the air is moving eastward at 82 km/h, so the air velocity is
2) Relative to the air, the airplane is moving westward at 907 km/h, so its velocity is
In the reference system of the ground, the velocity of the airplane will be given by the velocity of the airplane in the reference system of the air (v) plus the velocity of the reference system of the air relative to the ground (v'):
Therefore, substituting:
And the sign (+) means its direction is westward.