A constant force F acts on block 1 with mass m and block 2 with mass 2m. Which graph correctly represents the accelerations of the blocks ?
A. 
B. 
C. 
Since F = ma, if the force is constant, the acceleration is constant. Constant acceleration is represented by a horizontal line on an acceleration versus time graph. Since a = F/m, the one with he largest m will have the smallest acceleration, since the force is the same.
C. 
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Two-Source Interference of Sound: Two in-phase loudspeakers are 3.0 m apart. They emit sound with a frequency of 490 Hz. A microphone is placed half-way between the speakers and then moved along the line joining the two speakers until the first point of constructive interference is found. At what distance from that midpoint is that first point? The speed of sound in air is 343 m/s.
A. 0.18 m B. 0.35 m C. 0.50 m D. 0.70 m E. There is no point in that line where constructive interference occurs.
Monochromatic light of wavelength 500 nm is incident normally on a grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?
A) 0.93 ?m B) 1.4 ?m C) 2.8 ?m D) 8.5 ?m
The processes which produced Ganymede's groove terrain are on-going, according to the latest Galileo images
Indicate whether the statement is true or false
A statement found to be experimentally valid over a wide range of observed phenomena is referred to as a
A) model. B) theory. C) law. D) principle. E) hypothesis.