For relaxed viewing with a microscope or a telescope, the eyepiece is adjusted to place the image at
A) the near point of the eye.
B) the pupil of the eye.
C) the focal point of the eyepiece.
D) infinity.
E) the focal point of the objective lens.
D
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The force on a proton sitting midway between a pair of parallel conducting plates that sit at potentials of -17 V and 55 V, respectively is 7.68 x 10-16 N. What is the separation distance between the plates?
A. 3.0 cm B. 1.2 cm C. 0.58 cm D. 1.5 cm
First Law of Thermodynamics: A certain gas is compressed adiabatically. The amount of work done on the gas is 800 J. What is the change in the internal (thermal) energy of the gas?
A. 800 J B. -800 J C. 400 J D. 0 J E. More information is needed to answer this question.
Conservation of angular momentum explains why the contracting solar nebula's rotation rate increased as it contracted
Indicate whether the statement is true or false
Two point charges each have a value of 35.5 mC and are separated by a distance of 4.0 cm. What is the electric field midway between the two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 7.1E+8 N/C b. 3.5E+8 N/C c. 1.8E+8 N/C d. zero e. 2.0E+8 N/C