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2 years ago

Can you help me with this paper please I will give you 20 points!

Physics

2 answers:

sweet [91]2 years ago

6 0

1) they are attracting because if you look at the arrows they’re all pointing the same way.

2) if the magnet was turned around they would do the opposite and not attract ( this is called repulsion)

3) magnetic pole

4)magnet

5) magnetic force

6) magnetism

Hope this helps

mihalych1998 [28]2 years ago

3 0

Answer: What Is Magnetism

Explanation:

1. Yes, these magnets are attracting on a magnet South and South DO NOT attract only South and North same goes for North and North

2. If the magnet on the left were to turn around it would now be North and North so therefore there would be an immediate repel

3. North and South pole

4. Magnet

5. Magnetic force

6. Magnetism

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2 years ago

A motorcycle is travelling at a constant velocity of 30ms. The motor is in high gear and emits a hum of 700Hz. The speed of soun

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Answer:

a) $T=1.43\times 10^{-3}\ s$

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Explanation:

Given:

velocity of the sound from the source, $S=340\ m.s^{-1}$

original frequency of sound from the source, $f_s=700\ Hz$

speed of the source, $v_s=30\ m.s^{-1}$

(a)

We know time period is inverse of frequency:

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$T=\frac{1}{f}$

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(b)

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$d=v_s.T$

$d=30\times 1.43\times 10^{-3}$

$d=0.0429\ m$

(c)

The distance travelled by the sound during the period of one oscillation is its wavelength.

$\lambda=\frac{S}{f}$

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(d)

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$\frac{f_o}{f_s}= \frac{S+v_o}{S-v_s}$ ...........................(1)

where:

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Here, observer is stationary.

$\therefore v_o=0\ m.s^{-1}$

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$\frac{f_o}{700}= \frac{340+0}{340-30}$

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3 years ago

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3 years ago

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