A 30-N box is pulled upward 6.0 m along the surface of a ramp that rises at 37° above the horizontal. How much work does the gravitational force exerted on the box by Earth do on the box during this process?
A) -1100 J
B) -110 J
C) -140 J
D) -180 J
E) 120 J
B
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Potential of Point-Charges: A sphere with radius 2.0 mm carries a +2.0 ?C charge. What is the potential difference, VB - VA, between point B, which is 4.0 m from the center of the sphere, and point A, which is 6.0 m from the center of the sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 1500 V B. -1500 V C. 170 V D. -0.63 V
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Indicate whether the statement is true or false
A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye
a. 3.5 b. 7.0 c. 9.2 d. 12 e. 2.5
What is the relation between the depth of earthquakes and their distance from the Tonga Trench?