Two loudspeakers placed 6.00 m apart are driven in phase by an audio oscillator having a frequency range from 1595 Hz to 2158 Hz
A point P is located 4.70 m from one loudspeaker and 3.60 m from the other speaker. The speed of sound in the room is 344 m/s. At what frequency (or frequencies) of the oscillator does the sound reaching point P interfere destructively? (There could be more than one correct choice.)
A) 2100 Hz B) 1720 Hz C) 1630 Hz D) 2130 Hz E) 2030 Hz
B, E
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An object moves with speed vx = +0.9 in the Home Frame. In an Other Frame moving at ? = 0.60 relative to the Home Frame, the object’s x-velocity v?x is
A. v?x = 1.5 B. 1 < v?x < 1.5 C. 0.9 < v?x < 1 D. 0.3 < v?x < 0.9 E. v?x < 0.3 F. v?x < 0
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The linear momentum of the crate is __________
Fill in the blank(s) with correct word
Bumpers on cars are not of much use in a collision. To see why, calculate the average force a bumper would have to exert if it brought a 1200-kg car (a so-called compact model) to a rest in 15 cm
when the car had an initial speed of 2.0 m/s (about 4.5 mph). (Bumpers are built with springs that compress to provide a stopping force without, hopefully, denting the metal.) A) 3.2 × 104 N B) 1.6 × 104 N C) 5.4 × 104 N D) 1.8 × 104 N E) 6.5 × 105 N
If the polarizing angle for cubic zirconia (zirconium oxide) is 65.6°, what is the index of refraction of the material?
a. 1.84 b. 2.00 c. 2.20 d. 2.43 e. 1.17