The amplitude of the wave is equal to the sum of the amplitudes of the two waves if the phase of the two waves is the same.
54+64=118 <span>units
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The correct answer for this would be "A car traveling the speed limit" this is because the car is not accelerating, and all the other answers are wrong because the objects in those are accelerating <span />
No. You cannot rule out the battery even after the open circuit voltage measurement. The open-circuit voltage may not have changed but the battery's internal resistance may have greatly increased.
