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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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Explanation:

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The angle after which cue ball is deflected is given by

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Answer:

Incomplete question

This is the completed question

If the resistor in the circuit had a larger resistance then the current would be then have to be proportionally smaller. Because the batteries each give off 1.5 volts then the current would have to be the variable that would change. What affect would using a 12V car battery have on the operation of your circuit? (Do not try this.) What would happen to the current? What would happen to the resistor?

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