The airplane above now moves due east while the alien pilot points the plane somewhat south of east, toward a steady wind that blows to the northeast. The plane Phas velocity ⃗vP W relative to the wind W , with an airspeed (speed relative to the wind) of 215 km/h, directed at angle θ south of east. The wind has velocity ⃗vWG relative to the ground G with speed 65.0 km/h, directed 20.0◦ east of north. What is the magnitude of the velocity ⃗vP G of the plane relative to the ground, and what is θ?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.