A body in a room at 300 K is heated to 3,000 K. The wavelength of the most intense EM radiation emitted by the body at 3,000 K is __________ times the wavelength of the most intense EM radiation at 300 K
Fill in the blank(s) with correct word
0.1
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A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 7.6 × 1014 Hz B) 8.5 × 1014 Hz C) 2.7 × 1014 Hz D) 9.4 × 1014 Hz E) 6.8 × 1014 Hz
Kinetic energy is conserved in elastic collisions
Indicate whether the statement is true or false
Which of the following statements are true about light waves?
a)The higher the frequency, the longer the wavelength. b)The lower the frequency, the longer the wavelength. c)Higher-frequency light travels faster than lower-frequency light. d)The shorter the wavelength, the higher the frequency. e)The lower the frequency, the shorter the wavelength.
The current through a circuit consisting of a single battery and single resistor is measured to be 0.25 ampere. Another identical battery and another identical resistor are added to the circuit. The current passing through the circuit is
A. 0.125 A. B. 0.50 A. C. 0.25 A. D. dependent on how the battery and resistor are added to the circuit.