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Darina [25.2K]
3 years ago
8

Lydia noticed that she feels tired and out of breath after walking her dog up a hill in the park. Which area of fitness does she

need to improve?
Computers and Technology
1 answer:
amm18123 years ago
8 0

Answer:

respiratory and physical (movement)

Explanation:

examples for respiratory:swimming,free diving,jogging

physical: athletes,karate

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At the frequency of 2.4 GHz what is the free-space path loss in dB.
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Answer:

The FSBL is 100.05 dB

Solution:

As per the question:

Frequency, f = 2.4 GHz = 2.4\times 10^{9}

Now, we know that to calculate FSBL, i.e., Free Space Path Loss in dB, we use:

FSBL(in dB) = 10log_{10}(\frac{4\pifd}{c})^{2}

where

d = 1 km = 1000

c = 3\times 10^{8} m/s

FSBL(in dB) = 20log_{10}\frac{4\pifd}{c} = 20log_{10}(fd) + 20log_{10}(\frac{4\pi}{c})

FSBL(in dB) = 20log_{10}(f) + 20log_{10}(d) + 20log_{10}(\frac{4\pi}{c})

FSBL(in dB) = 20log_{10}(2.4\times 10^{9}) + 20log_{10}(10^{3}) + 20log_{10}(\frac{4\pi}{3\times 10^{8}})

FSBL(in dB) = 20\times 9.3802 + 20\times 3 - 147.55 = 100.05 dB

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