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# Phasors: 90 Degrees

WAVES-XFHG6K

Phasors representing two waves on the same string are shown below. The phase angle is $90^\circ$.

What is the amplitude of the resulting wave?

A

$5.0\text{ cm}$

B

$8.0\text{ cm}$

C

$9.4\text{ cm}$

D

$13\text{ cm}$