16. The work function for lithium is 2.3 eV. The surface is illuminated with some electromagnetic wave. If the stopping potential is 0.6 V, the wavelength of the wave is ______. (A) 428 nm (B) 213 nm (C) 100 nm (D) 80 nm (E) 50 nm

2. The first stage of a Saturn V space vehicle consumes fuel and oxidizer at the rate of 1.50 × 10⁴ kg/s, with an exhaust speed of 2.60 × 10³ m/s. What is the acceleration of the vehicle just as it vertically lifts off the launch pad on the Earth if the vehicle's initial mass is 3.00 × 10⁶ kg? (A) 7.40 m/s² (B) 5.37 m/s² (C) 3.20 m/s² (D) 1.48 m/s² (E) None of the above is correct.

16. The work function for lithium is 2.3 eV. The surface is illuminated with some electromagnetic wave. If the stopping potential is 0.6 V, the wavelength of the wave is ______.
(A) 428 nm
(B) 213 nm
(C) 100 nm
(D) 80 nm
(E) 50 nm

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