A quarter-wave monopole radio antenna (also called a Marconi antenna) consists of a long conductor of one quarter the length of
1 answer:
Answer:
145.91 m
Explanation:
Data provided in the the question:
Wavelength of radio wave,
Here, c is speed of radio wave in air = 3 × 10⁸ m/s
f is the frequency = 514 kHz = 514 × 10³ Hz
Thus,
Wavelength = (3 × 10⁸) ÷ (514 × 10³) m
or
Wavelength = 583.65 m
Thus,
The height of the antenna will be
= = 583.65 ÷ 4 m
= 145.91 m
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Answer:
Fc = 89.67N
Explanation:
Since the rope is unstretchable, the total length will always be 34m.
From the attached diagram, you can see that we can calculate the new separation distance from the tree and the stucked car H as follows:
L1+L2=34m
Replacing this value in the previous equation:
Solving for H:
We can now, calculate the angle between L1 and the 2m segment:
If we make a sum of forces in the midpoint of the rope we get:
where T is the tension on the rope and F is the exerted force of 87N.
Solving for T, we get the tension on the rope which is equal to the force exerted on the car:
