Answer:We have , a relation in frequency f and wavelength λ of a wave having the velocity v as ,
v=fλ ,
given f=60Hz , λ=20m ,
therefore velocity of wave , v=60×20=1200m/s
D. Mechanical energy remains unchanged.
Mechanical energy = Potential energy + Kinetic energy
So if potential energy decreases, then kinetic energy must increase so that the system is balanced.
' B ' is the only choice on the list that tells you a definite place, where you could go to pick up the object or meet somebody.
But in order to use it, you also have to know where the origin of coordinates is ... the point (0, 0) .
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No, I'm wrong about that. You have to know where SOME other point is, but that doesn't have to be (0, 0).
Answer:
i think it is 40 kilometers in the positive direction... if not im sorry
Explanation:
