New incandescent bulbs are more efficient than older types of incandescent bulbs
What will be an ideal response?
Incandescent bulbs represent old technology; the efficiency has not changed
greatly recently.
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The lower the temperature of an object, the
A) lower the frequency of radiation it emits. B) longer the wavelengths it radiates. C) both of these D) neither of these
You push your physics book across a table. The book weighs 8 N, you push with a steady 5 N force, and the force of friction against the book is 3 N. You push the book a distance of 2 m. The amount of work you do on the book is
A) zero. B) 6 J. C) 16 J. D) 10 J. E) impossible to tell without more information.
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers, along the line joining them, at a constant speed of 2.8 m/s
What beat frequency do you observe? The speed of sound in the room is 330 m/s. A) 13 Hz B) 431 Hz C) 26 Hz D) 4.7 Hz E) 118 Hz
The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 5, there will be how many permitted orbital magnetic quantum numbers allowed?
a. 7 c. 5 b. 15 d. 11