According to Faraday’s Law of Electromagnetic Induction, the induced voltage is equal to
A. the rate of change of the magnetic flux
B. the rate of change of the magnetic field strength
C. the rate of change of the magnetic force
D. the rate of change of the loop area
A. the rate of change of the magnetic flux
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Most minerals can be identified by easily observable physical properties. In order of most useful to least useful, the identifiable physical properties are
A) color, crystal form, hardness, cleavage, and density. B) hardness, cleavage, density, crystal form, and color. C) crystal form, color, hardness, cleavage, and density. D) crystal form, hardness, cleavage, color, and density.
Which of these stars lies closest to the north celestial pole on the celestial sphere?
Consider the following data for four stars: Star RA Dec. Spica 13hr24m.1 -11°20' Deneb 20hr39m.7 +45°06' Sirius 6hr44m.2 -16°42' Alpha Centauri 14hr38m.4 -60°46' A) Deneb B) Alpha Centauri C) Spica D) Sirius
The vector sum of three co-planar forces
a. must be zero. b. must be perpendicular to one of the three. c. must be parallel to one of the three. d. must be perpendicular to the plane. e. may have any direction in the plane.
If you double the pressure on the surface of a can of water, the buoyant force on a stone placed in that water will
A) decrease, but not by one-half. B) increase, but not double. C) not change. D) double.