If a rubidium surface is irradiated with blue light of wavelength 450.0 nm, what is the kinetic energy of the electrons emitted? (The work function for rubidium is f = 2.09 eV.)
0.67 eV
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Compound Microscope: The objective lens and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm, respectively. The objective produces a real image 30 times the size of the object, with the final image viewed at infinity. The near point of the microscope user is at 25 cm. What is the magnitude of the overall magnification of the microscope?
A. 250 B. 300 C. 350 D. 400 E. 450
When photon absorption occurs in a hydrogen
atom, the principal quantum number of the electron must a) decrease. b) remain the same. c) increase. d) become identical to that of a ground state electron. •
Why does a hot dog pant?
What will be an ideal response?
In Figure 9.1, the time t, when P returns to the original position on the x-axis, is closest to:
A) 13 s B) 18 s C) 25 s D) 35 s E) 50 s