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larisa [96]
3 years ago
10

The radar system of a navy cruiser transmits at a wavelength of 2.0 cm, from a circular antenna with a diameter of 2.0 m. At a r

ange of 7.8 km, what is the smallest distance in meters that two speedboats can be from each other and still be resolved as two separate objects by the radar system?
Physics
1 answer:
Snezhnost [94]3 years ago
6 0

Answer:

95.16 m

Explanation:

L = Range of radar = 7.8 km

\lambda = Wavelength = 2 cm

d = Diameter of antenna = 2 m

D = Distance

We have the relation

\dfrac{D}{L}=1.22\dfrac{\lambda}{d}\\\Rightarrow D=1.22\dfrac{L\lambda}{d}\\\Rightarrow D=1.22\dfrac{7800\times 0.02}{2}\\\Rightarrow D=95.16\ m

The smallest distance in meters that two speedboats can be from each other and still be resolved as two separate objects by the radar system is 95.16 m

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3 years ago
A long line of charge with uniform linear charge density λ1 is located on the x-axis and another long line of charge with unifor
Dahasolnce [82]

Answer:

A.The positive z-direction

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3 years ago
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Hope this helped!

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Have a good day :)

6 0
3 years ago
HELP
dem82 [27]

Answer:

Explanation:

28 / 70 = 0.3857142...  = 0.39 hr

280 / 100 = 2.8 hrs.

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(60 - 20) / 4 = 10 m/s²

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