40V because it will provide the same amount of power.
higher temp = higher energy = higher frequency = shorter wavelength
Weight. Because there is less gravity on the moon.
<span>The average weather of a particular place is "Climate"
In short, Your Answer would be Option B
Hope this helps!</span>
Answer:

Explanation:
Given data
Flight distance S=4890 km
Time difference Δt=t₂-t₁=40 min
Air speed of plane=980 km/h
To find
Speed of jet stream
Solution
When moving in the same direction as the jet stream time taken as t₁=d/(v+vs),v is velocity of plane and vs is velocity of plane
While moving in opposite direction t₂=d/(v+vs)
So

Apply quadratic formula to solve for vs
So