In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2
5 m, find the spacing between the first-order and second-order bright fringes when coherent light of wavelength 600 nm illuminates the slits.
A) 6.0 cm B) 3.0 cm C) 1.5 cm D) 4.5 cm E) 9.0 cm
B
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You are in a place that is extremely hot and dense, making you feel quite sweaty and claustrophobic. You can't see far because your surroundings are opaque to light. Around you, nuclear fusion is converting carbon into oxygen and other elements
Where are you? A) You are in the center of a star very much like our Sun. B) You are in the early universe during the era of nucleosynthesis. C) You are inside a nuclear power plant on Earth. D) You are in the center of a massive star near the end of its life. E) You are in the center of a star much smaller than the Sun.
An electron and an alpha particle (a helium-4 nucleus) each have the same non-relativistic speed. Which has the greatest kinetic energy, and which has the shortest de Broglie wavelength?
a. the alpha particle, the alpha particle b. the alpha particle, the electron c. the electron, the alpha particle d. the electron, the electron
Which of the following is true of the scientific names of constellations?
A) They are in Latin or Greek. B) They are in French or Italian. C) They are in Hebrew or Arabic. D) They are in Sumerian or Mayan.
A sealed container holds 0.020 moles of nitrogen (N2 ) gas at a pressure of 1.5 atmospheres and a temperature of 290 K. The atomic mass of nitrogen is 14 g/mol
The Boltzmann constant is 1.38 × 10-23 J/K and the ideal gas constant is R = 8.314 J/mol•K = 0.0821 L ? atm/mol ? K. The average translational kinetic energy of a nitrogen molecule is closest to A) 4.0 × 10-21 J. B) 10 × 10-21 J. C) 6.0 × 10-21 J. D) 12 × 10-21 J. E) 8.0 × 10-21 J.