Light with a wavelength of 310 nm is incident on a metal that has a work function of 3.80 eV
What is the maximum kinetic energy that a photoelectron ejected in this process can have? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 0.62 × 10-19 J
B) 0.21 × 10-19 J
C) 0.36 × 10-19 J
D) 0.48 × 10-19 J
E) 0.33 × 10-19 J
E
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A. Celestial equator B. ecliptic C. North Celestial Pole D. South Celestial Pole
Metals are good conductors of both heat and electricity due to
A) similar thermal and electrical conductive properties. B) looseness of outer electrons in metal atoms. C) relatively high densities of metals. D) high elasticity of metals. E) both transferring energy easily.
Another name for glucose is
a. dextrose. b. malt sugar. c. sucrose. d. lactose.
In a series RLC ac circuit, a second resistor is connected in series with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?
A) It increases. B) It does not change. C) It increases for frequencies below resonance and decreases for frequencies above resonance. D) It decreases for frequencies below resonance and increases for frequencies above resonance. E) It decreases.