To what types of electrically charged objects does Coulomb's law apply?
A) only pointlike particles
B) any symmetric objects
C) it applies to all such objects
D) only pointlike particles and objects that can be treated as particles
E) it applies to all such objects as long as they are not moving
D) only pointlike particles and objects that can be treated as particles
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If 3 inch diameter bars of steel are to be air dried in still air, recommend a horizontal arrangement of the bar placement so that the adjacent bars do not interfere with the cooling process.
What will be an ideal response?
If a planet orbits a star in an ellipse, when the planet is at its closest approach to the star we say the planet is at
a) opposition b) aphelion d) perihelion
A violet-hot star emits radiation having about twice the peak frequency of radiation from a red-hot star. The surface temperature of the hotter star is about
A) half that of the cooler star. B) twice that of the cooler star. C) the same.
A circuit contains two inductors of 6.0-mH inductance in series placed in parallel with an inductor of 8.0-mH inductance. After one of the 6.0-mH inductors burns out, the repair person wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should she use?
a. 3.0 mH b. 3.4 mH c. 4.8 mH d. 11 mH e. 20 mH