A. A cubical surface oriented so that two opposite faces are perpendicular to the y axis.
B. A spherical surface.
C. A cylindrical can-like surface oriented with its central axis perpendicular to the y axis.
D. A cylindrical can-like surface oriented with its central axis parallel to the y axis.
E. A cone-like surface oriented with its central axis parallel to the y axis.
C. A cylindrical can-like surface oriented with its central axis perpendicular to the y axis.
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Visible light consists of electromagnetic waves with wavelengths (in air) in the range 400 - 700 nm. What are the frequencies of visible light?
a. 
b. 
c. 
d. 
Your mass is 50 kg. Suppose you are standing on a scale in an elevator that is approaching a top floor and decreasing its speed at the rate of 3 m/s every second. What would be the reading on the scale?
A. 0 N B. 150 N C. 740 N D. 640 N E. 340 N
The distinction between impulse and force involves the
A) distance the force acts. B) time the force acts. C) difference between acceleration and velocity. D) mass and its effect on resisting a change in momentum.
Which is the best description of Earth's orbit?
Which is the best description of Earth's orbit? A) It is nearly circular with Earth slightly closer to the Sun in summer in the northern hemisphere. B) It is nearly circular with Earth slightly closer to the Sun in winter in the northern hemisphere. C) It is highly elliptical with Earth slightly closer to the Sun in summer in the northern hemisphere. D) It is highly elliptical with Earth slightly closer to the Sn in winter in the northern hemisphere.