Photoelectric Effect: When it is struck by 240-nm photons, a material having a work function of 2.60 eV emits electrons. What is the maximum kinetic energy of the emitted electrons? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 2.58 eV
B. 5.18 eV
C. 2.00 eV
D. 4.21 eV
Answer: A
Physics & Space Science
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An iron barge 25. m long and 4.0 m wide has a mass of 100,000.kg. What minimum depth of water is needed to float it?
What will be an ideal response?
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Internal energy can only be changed by adding heat
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Of the following gases, which is the most important contributor to the Earth's greenhouse effect?
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Physics & Space Science