A puddle of water has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film
If the wavelength of light incident on the film is 560 nm and the indices of refraction of gasoline and water are 1.40 and 1.33, respectively, what is the minimum thickness of the film to see a bright reflection?
A) 100 nm
B) 200 nm
C) 300 nm
D) 400 nm
E) 500 nm
A
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A substance is heated from 23°C to 45°C. What would the same incremental change be when registered in kelvins?
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A 2 000-kg sailboat experiences an eastward force of 3 000 N by the ocean tide and a wind force against its sails of magnitude 6 000 N directed toward the northwest (45° N of W). What is the magnitude and direction of the resultant acceleration?