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elena-s [515]
3 years ago
7

What 3 things do you need to make an electromagnet ?

Physics
2 answers:
PolarNik [594]3 years ago
6 0

Answer:

magnet coppers wire and piece of metals

Hunter-Best [27]3 years ago
5 0

Answer:

1. Battery

2. Copper wire

3. Nail or piece of metal (zinc, iron, or steel).

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2HCl + MgO ---> MgCl2 + H2O
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Julia can swim at 3.5 km/h in still water. She attempts to head straight north
raketka [301]

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3 years ago
How fast, in rpm, would a 5.6 kg, 25-cm-diameter bowling ball have to spin to have an angular momentum of 0.26 kgm2/s
solong [7]

Answer:

71 rpm

Explanation:

Given that:

Angular momentum (L) = 0.26

Diameter = 25cm = 0.25 cm

Radius, r = (d/2) = 0.125m

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I = (2 * 5.6 * 0.125^2) / 5

= 0.175

= 0.175 / 5

= 0.035 kgm²

Angular speed (w) ;

w = L / I

w = 0.26 / 0.035

= 7.4285714

= 7.429 rad/s

w = (7.429 * 60/2π)

w = 445.74 / 2π rpm

w = 70.941724

Angular speed = 70.94 rpm

= 71 rpm

5 0
3 years ago
Need help solving this
Nostrana [21]

Answer:

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Explanation:

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3 years ago
If a car changes its velocity from 32km/hr in 8.0 seconds what is its acceleration
puteri [66]

We don't know the change in velocity, so can't answer.

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