Two point sources emit sound waves of 1.0-m wavelength. The sources, 2.0 m apart, as shown below, emit waves which are in phase with each other at the instant of emission. Where, along the line between the sources, are the waves out of phase with each other by ? radians?
a.
x = 0, 1.0 m, 2.0 m
b.
x = 0.50 m, 1.5 m
c.
x = 0.50 m, 1.0 m, 1.5 m
d.
x = 0.75 m, 1.25 m
e.
x = 0.25 m, 0.75 m, 1.25 m, 1.75 m
d
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A T-shaped simple beam has a cable with force P anchored at B and passing over a pulley at E, as shown in the figure. The bending moment just left of C is 1.25 kN?m. The cable force P is approximately:
(A) 2.7 kN
(B) 3.9 kN
(C) 4.5 kN
(D) 6.2 kN
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After the bucket has been released, (a) what is the angular acceleration of the pulley, and (b) what is the acceleration of the bucket?
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Indicate whether the statement is true or false