A metal having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 4.0 eV. What is the maximum kinetic energy of the photoelectrons produced by this light? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 5.5 × 10-19 J
B) 2.6 × 10-19 J
C) 3.8 × 10-19 J
D) 4.7 × 10-19 J
E) 6.4 × 10-19 J
B
You might also like to view...
What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface?
The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 1.45 h B) 1.00 h C) 1.15 h D) 1.25 h E) 1.75 h
Elementary Particles: Which of the following statements about hadrons are correct? (There may be more than one correct choice.)
A. Hadrons are composed of leptons. B. All hadrons are composed of quarks. C. All hadrons interact by the strong nuclear force. D. Electrons, protons, and neutrons are commonly-occurring hadrons. E. Protons and neutrons are hadrons, but the electron is not.
The changing shapes of constellations in the night sky is caused by
A) the rotation of our planet about its axis. B) the revolution of our planet around the Sun. C) the movement of our planet within the Milky Way. D) the tilt of Earth's axis.
The largest single-dish radio telescope is
a. suspended on cables in a valley. b. buried deep in a mine underground. c. orbiting in space. d. suspended from balloons in the upper atmosphere.