Two small forward-facing speakers are 2.50 m apart. They are both emitting, in phase with each other, a sound of frequency 1100 Hz in a room where the speed of sound is 344 m/s
A woman is standing opposite the midpoint between the speakers and is initially 35.0 m from the midpoint. As she slowly walks parallel to the line connecting the speakers, at what angle ? (relative to the centerline coming outward from the midpoint between the speakers) will she first hear no sound?
A) 1.8° B) 7.2° C) 3.6° D) 11° E) 0.063°
C
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A ball is rolled horizontally off a table with an initial speed of 0.24 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.36 s. What is the height of the table? (g = 9.8 m/s2 and air resistance is negligible)
a. 0.72 m b. 0.55 m c. 0.016 m d. 0.64 m e. 0.65 m
Order the following situations according to the magnitude of the magnetic field at the point P. Order from highest to lowest
1.ABCD
2.ADBC
3.BDAC
4.CADB
5.DABC
6.None of the above
In Figure 6-2 the scale at left is attached to the ceiling and a mass of 1.00 kg hangs from it. It reads 9.81 N. The identical scale at the right is connected by perfect strings passing over perfect pulleys to two 1.00 kg masses hanging vertically at the end of the strings. The scale at right reads
A. exactly 9.81 N.
B. less than 9.81 N
D. more than 9.81 N,
E. more than 19.62 N
As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity 
directed to the right. Which statement regarding the electric field induced in the wires is correct for the wires at the left and right sides of the loop?
?
?
A.
is directed upwards in both the right and left sides of the loop.B.
is directed upwards in the right side and downwards in the left side of the loop.C.
is directed upwards in the left side and downwards in the right side of the loop.D.
is directed downwards in both the right and left sides of the loop.E.