A photoelectric surface has a work function of 2.10 eV
Calculate the maximum kinetic energy, in eV, of electrons ejected from this surface by electromagnetic radiation of wavelength 356 nm. (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
1.39 eV
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Your radio is tuned to 98 on the FM dial. What electromagnetic wave frequency is your radio receiving, and how fast is this wave traveling?
A) 98 × 106 Hz, at the speed of sound B) 98,000 Hz, at the speed of sound C) 98 Hz, at a speed of 300,000 km/s D) 98,000 Hz, at a speed of 300,000 km/s E) 98 × 106 Hz, at a speed of 300,000 km/s
A 15-mF capacitor and a 30-mF capacitor are connected in series, and charged to a potential difference of 50 V. What is the resulting charge on the 30-mF capacitor?
a. 0.70 mC b. 0.80 mC c. 0.50 mC d. 0.60 mC e. 0.40 mC
For a galaxy to be active, the supermassive black hole needs to have matter flow into it
a. True b. False Indicate whether the statement is true or false
Coherent monochromatic light of wavelength 632.8 nm passes through a pair of thin parallel slits. The figure shows the central portion of the pattern of bright fringes viewed on a screen 1.40 m beyond the slits. What is the distance between the two slits?
A) 0.0703 mm B) 0.141 mm C) 0.281 mm D) 0.562 mm E) 0.633 mm