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Ivenika [448]
2 years ago
15

Katie traveled southwest a distance of 4000m on a bicycle in 5400s. What is her velocity?

Physics
1 answer:
nlexa [21]2 years ago
7 0
The correct answer would be 1.35m/s sw.
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Which statement is true?
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Estimate the wavelength corresponding to maximum emission from each of the following surfaces: the sun, a tungsten filament at 2
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Answer

Applying Wein's displacement

\lamda_{max}\ T = 2898 \mu_mK

1) for sun T = 5800 K

      \lambda_{max} = \dfrac{2898}{5800}

      \lambda_{max} = 0.5 \mu_m

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      \lambda_{max} = \dfrac{2898}{2500}

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3) for heated metal T = 1500 K

      \lambda_{max} = \dfrac{2898}{1500}

      \lambda_{max} = 1.93 \mu_m

4) for human skin T = 305 K

      \lambda_{max} = \dfrac{2898}{305}

      \lambda_{max} = 9.50 \mu_m

5)  for cryogenically cooled metal T = 60 K

      \lambda_{max} = \dfrac{2898}{60}

      \lambda_{max} = 48.3 \mu_m

range of different spectrum

UV ----0.01-0.4

visible----0.4-0.7

infrared------0.7-100

for sun T = 5800

λ              0.01           0.4               0.7                 100

λT             58           2320            4060             5.8 x 10⁵

F                0             0.125             0.491                1

fractions

for UV = 0.125  

for visible = 0.441-0.125 = 0.366

for infrared = 1 -0.491 = 0.509  

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3 years ago
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When two objects collide their momentum after the collision is explained by what?
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<span>When two objects collide their momentum after the collision is explained by</span> the conservation of momentum
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Which country had the largest population in 1997
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