There is an induced emf in a wire that is moving parallel to a magnetic field if the wire is moving in the opposite direction to that of the magnetic field
Indicate whether the statement is true or false
FALSE
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Lens-Maker Formula: A double-convex thin lens has radii of curvature of magnitude 46 cm, and it is made of glass of index of refraction 1.60. What is the focal length of this lens?
A. infinite B. 38 cm C. -30 cm D. 18 cm E. -19 cm
A.A B.B C.C D.D E. Toward the viewer F. Away from the viewer T. The field is zero.
What is the result of the Greenhouse effect on the surface environment of Venus?
A) It has little or no effect. B) Its effect is about the same as on Earth. C) It has reduced the surface temperature by about 30 degrees Celsius. D) It has raised the surface temperature by hundreds of degrees Celsius. E) It causes the surface temperature of Venus to become hotter than the Sun.
What do we mean by inflation?
A) the rapid expansion of the universe, driven by white dwarf supernova, that we still observe today B) the expansion of universe starting with the instant after the Big Bang C) the sudden release of photons when particles and antiparticles annihilate each other D) a sudden expansion of the universe driven by the energy released when the strong and electroweak forces froze out from the GUT force E) the photons released when electrons and protons first combined, forming the Cosmic Microwave Background Radiation