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astra-53 [7]
3 years ago
9

What is a magnetic field’s shape?

Physics
1 answer:
Agata [3.3K]3 years ago
7 0

Answer:

Magnets come in a variety of shapes and one of the more common is the horseshoe (U) magnet. The horseshoe magnet has north and south poles just like a bar magnet but the magnet is curved so the poles lie in the same plane. The magnetic lines of force flow from pole to pole just like in the bar magnet.

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The Doppler effect using ultrasonic waves of frequency 2.25 × 106 Hz is used to monitor the heartbeat of a fetus. A (maximum) be
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Answer:

v = 2.88 \times 10^7 m/s

Explanation:

As per Doppler's effect we know that the frequency of the sound that is observed by the detector is the reflected sound

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f - f' = \Delta f

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so we have

0.99989 = (\frac{v - 1540}{v + 1540})

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