The work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can cause photoelectron emission from this metal?
A) 231 nm
B) 14.0 nm
C) 62.4 nm
D) 344 nm
E) 653 nm
E
You might also like to view...
A Hooke's law spring is compressed 14.6 cm from equilibrium, and the potential energy stored is 76.0 J. What compression (as measured from equilibrium) would result in 100 J being stored in this case?
a. 11.8 cm b. 16.7 cm c. 43.8 cm d. 33.5 cm e. No answer is correct.
The copolymer styrene-butadiene rubber (SBR), shown below, is used for making tires as well as bubble gum. Is it an addition polymer or a condensation polymer?
A) SBR is an addition polymer. B) SBR is an condensation polymer. C) SBR is neither an addition nor a condensation polymer. D) SBR is both an addition and a condensation polymer.
Young's Modulus: A 1200-kg car is being raised at a constant speed if 25 cm/s by a crane, using a 20-m long steel cable that is 1.5 cm in diameter. Young's modulus for steel is 2.0 × 1011 Pa. What is the change in length of the cable caused by the car?
A. 6.7 mm B. 6.7 cm C. 3.3 mm D. 3.3 cm E. 3.3 m
The longest wavelength of a photon that can be emitted by a hydrogen atom, for which the initial state is n = 3, is closest to which one of the following values? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 625 nm B) 600 nm C) 550 nm D) 658 nm E) 575 nm