Answer air circulating in a hot air balloon
Explanation:
The Doppler effect occurs when a source of sound or light
moves either toward or away from the observer.
The term you need to know is equilibrium. Technically it means that heat gained = heat lost. Normally in beginning chemistry classes the evidence for this condition is a stable temperature.
Resultant displacement between the base camp and the cave will be 7.211 km
Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Her resultant displacement can be calculated using Pythagoras theorem

= 
= 52
H =
= 7.211 km
Resultant displacement between the base camp and the cave will be 7.211 km
To learn more about displacement here :
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