When a bar magnet is broken in half, the strength of the four new poles relative to pole strength before breaking is
A) less than half.
B) half.
C) the same.
D) somewhat more.
Answer: C
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Lens-Maker Formula: A double-convex thin glass lens has equal-magnitude radii of curvature. The focal length of the lens is +37.3 cm and the index of refraction of the glass is 1.52. What is the magnitude of the radius of curvature of each convex surface?
A. 39 cm B. 35 cm C. 31 cm D. 43 cm E. 46 cm
In a double-slit interference experiment, a wave from one slit arrives at a point on a screen one-half wavelength behind the wave from the other slit. What is observed at that point?
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A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160. m drops a package of supplies. Two seconds later it drops a second package. How far apart will the two packages land on the ground?
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In Vienna, there is a Ferris wheel designed so that the passengers ride in a standing position. If one of the passengers were standing on a bathroom scale while the ride rotated at a constant speed, the scale would read lowest at
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