A diffraction grating is to be used to find the wavelength of the light in the emission spectrum of a gas
The grating spacing is not known, but a light having a known wavelength of 632.8 nm is deflected by 43.2° away from the central maximum in the second order by this grating. Light of the wavelength to be measured is deflected by 48.2° away from the central maximum in the second order. What is the wavelength of this light?
689 nm
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In outer space, you observe a straight stream of electrons flowing past you at 14.5 miles per second, about the same speed that Mars moves on its orbit around the sun.
You maneuver your spacecraft to face the current so that the electrons are moving from left to right and so that you are 10 m from the stream. In what direction does a compass needle point?
A. down 
B. up 
C. left 
D. right 
E. You observe no magnetic field
Is the synthesis of ozone, O3, from oxygen, 02, an example of an exothermic or endothermic reaction?
A) exothermic because ultraviolet light is emitted during its formation B) endothermic because ultraviolet light is emitted during its formation C) exothermic because ultraviolet light is absorbed during its formation D) endothermic because ultraviolet light is absorbed during its formation
The suffix -ol in a compound's name signifies
a. an enzyme. b. an amide. c. an alcohol. d. a carbohydrate.
Earth is a noninertial reference system:
a. only because it rotates. b. only because it revolves. c. only because of the movement of the Milky Way Galaxy. d. only because of the motion of the Moon. e. because of all the various ways it moves, including rotation, revolution, and the movement of the Galaxy.