An observer stands 3 m from speaker A and 4 m from speaker B. Both speakers, oscillating in phase, produce 170-Hz waves. The speed of sound in air is 340 m/s. What is the phase difference (in radians) between the waves from A and B at the observer's location, point P?
?
?
A.
B.
C.
D.
E.
Answer: C
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In thermoset polymers, the cross-link and three-dimensional covalent bonds _________ creep.
Fill in the blank(s) with the appropriate word(s).
For general projectile motion with no air resistance, the vertical component of a projectile's acceleration
A) is always zero. B) remains a non-zero constant. C) continuously increases. D) continuously decreases. E) first decreases and then increases.
A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat table. If the coefficient of sliding friction is 0.19, find the tension in the string
?
?
a.
59.0 N
b.
67.5 N
c.
20.7 N
d.
37.5 N
A loop of area 0.250 m2 is in a uniform 0.0200-T magnetic field. If the flux through the loop is 3.21 × 10^–3 T•m2, what angle does the normal to the plane of the loop make with the direction of the magnetic field?
a. 40.0° c. 50.0° b. 37.5° d. This is not possible.