When a steady voltage is across one-half as much resistance, the current
A) is half.
B) remains the same.
C) is doubled.
D) is quadrupled.
Answer: C
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Compared to the masses of its separate protons and neutrons, the total mass of a stable nucleus is always
A) less. B) the same. C) greater. D) zero. E) varies from atom to atom.
Refracting Telescope: An astronomical refracting telescope is made from two lenses. The objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17.0 cm.(a) What is the total length of the telescope?(b) What is the angular magnification of the telescope?(c) What is the magnification by turning the telescope around and looking through the objective lens first?
A. (a) 131 cm (b) 6.71 (c) 0.15 B. (a) 97 cm (b) 0.15 (c) 6.71 C. (a) 262 cm (b) 0.87 (c) 1.15 D. (a) 194 cm (b) 1.18 (c) 0.85
There is no induced emf in a wire that is moving parallel to a magnetic field if the wire is moving in the direction of the magnetic field
Indicate whether the statement is true or false
The point in time at which oxygen started to build up in the Earth's atmosphere is referred to as the
A) great oxidation event B) great oxygen crisis C) great oxygenation event D) great photosynthetic event