Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone is moved between the speakers along the line joining the two speakers with a constant speed of 1.60 m/s
What beat frequency is observed? The speed of sound in air is 343 m/s. A) 5.00 Hz
B) 6.00 Hz
C) 7.00 Hz
D) 8.00 Hz
E) 9.00 Hz
A
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Graphical Addition: The sum of two vectors of fixed magnitudes has the greatest magnitude when the angle between these two vectors is
A. 90°. B. 180°. C. 60°. D. 0°. E. 270°.
Two uniform solid balls, one of radius R and mass M, the other of radius 2R and mass 8M, roll down a high incline. They start together from rest at the top of the incline. Which one will reach the bottom of the incline first?
A) The small sphere arrives first. B) Both reach the bottom at the same time. C) The large sphere arrives first.
The International Date Line in theory is ___________, with variations to accommodate the needs of various countries
a. a longitude b. a meridian c. a latitude d. a parallel e. none of these
Ball bearings of 20% nickel steel, 10 cm spherical diameter, at 200ºC are quenched in 20ºC oil where the convective heat transfer coefficient is 200 W/m^2K. Determine a) the time for the surface to reach 80ºC, and b) the thermal energy exchanged during this time.
What will be an ideal response?