Physics, 21.06.2020 02:57 obalzano6817
The lifetimes of light bulbs are normally distributed with a mean of 1490 hours and a standard deviation of
150 hours
1. Determine the proportion of light bulbs lasting less than 1380 hours. Round your answer to 4 decimal
places
2. The longest lasting 5 percent of light bulbs last_hours or more. Round your answer to 1 decimal
place
3. The middle 85 percent of light bulbs last between__and_hours. Round your answers to 1
decimal place
4. Determine the proportion of light bulbs lasting between 1310 and 1680 hours. Round your answer to 4
decimal places
5. Determine the proportion of light bulbs lasting more than 1680 hours. Round your answer to 4
decimal places
6. The shortest-lasting 10 percent of light bulbs last hours or less. Round your answer to 1
decimal place
Answers: 2
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When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.
Answers: 3
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50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength
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Physics, 23.06.2019 17:30
During the refrigeration cycle, what does the refrigerant do? absorbs and releases thermal energy by first vaporizing then condensing. absorbs and releases thermal energy by first condensing then vaporizing. insulates the thermal energy away from the cooling area. transfers thermal energy to the cooling area by condensing.
Answers: 1
The lifetimes of light bulbs are normally distributed with a mean of 1490 hours and a standard devia...
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