Diffraction Gratings: A diffraction grating is to be used to find the wavelength of the emission spectrum of a gas. The grating spacing is not known, but light of a known wavelength of 632.8 nm is deflected by 43.2° in the second order by this grating. Light of the wavelength to be measured is deflected by 34.9° in the second order. What is the wavelength of the light that is to be measured?
Fill in the blank(s) with the appropriate word(s).
529 nm
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We are measuring the spectra of two hydrogen gas clouds. The laboratory frame wavelength of one hydrogen line is 656.2 nm. Cloud A's emission line wavelength is 660.1 nm and Cloud B's emission line wavelength is 670.1 nm
What can we conclude about these clouds? A) They are both approaching us, and Cloud A is approaching faster than Cloud B. B) They are both receding from us, and Cloud B is receding faster than Cloud A. C) They are both approaching us, and Cloud B is approaching faster than Cloud A. D) They are both receding from us, and Cloud A is receding faster than Cloud B.
A stone initially moving at 8.0 m/s on a level surface comes to rest due to friction after it travels 11 m. What is the coefficient of kinetic friction between the stone and the surface?
A) 0.13 B) 0.25 C) 0.30 D) 0.43 E) 0.80
A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration. The car comes to a stop in a distance of 120 m
What was the acceleration of the car as it slowed down? A) 3.75 m/s2 B) 4.00 m/s2 C) 4.25 m/s2 D) 4.50 m/s2 E) 4.75 m/s2
The nuclear model of the atom is associated with
a. Thomson. b. Dalton. c. Bohr. d. Rutherford.