Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 572 Hz. A microphone is moved between the speakers to record the wave amplitude at points along that line
What is the spacing between points where constructive interference occurs? The speed of sound in air is 343 m/s. A) 0.300 m
B) 0.600 m
C) 0.900 m
D) 1.20 m
E) 1.50 m
A
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The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
a.
its speed is constant.
b.
its speed is increasing.
c.
its speed is decreasing.
d.
its speed is a maximum.
e.
its speed is a minimum.
The law of inertia says that
A) if there is no force on a body, the body will have no acceleration. B) if there is a force on a body, the body will have a changing acceleration. C) if there is a force on a body, the body will have an unchanging velocity. D) if there is no force on a body, the body will have a changing velocity. E) if there is a force on a body, the body will have no acceleration.
What is the relationship between color and wavelength for light?
a. Wavelength increases from blue light to red light b. Wavelength decreases from blue light to red light c. All colors of light have the same wavelength. d. Wavelength depends on intensity not color.
Waves on a String: A piano wire of linear mass density 0.0050 kg/m is under a tension of 1350 N. What is the wave speed in this wire?
A. 130 m/s B. 260 m/s C. 520 m/s D. 1040 m/s