Vector = 4.00 m points eastward and vector = 3.00 m points southward. The resultant vector + is given by
A) 5.00 m at an angle 36.9 south of east.
B) 5.00 m at an angle 53.1 south of east.
C) 5.00 m at an angle 71.6 south of east.
D) 5.00 m at an angle 18.4 south of east.
E) 5.00 m at an angle 26.6 south of east.
Question 2
A sound source departs from a stationary observer. The frequency heard by the observer is
A) higher than the source.
B) lower than the source.
C) the same as that of the source.
D) equal to zero.
E) impossible to predict.