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3 years ago

15

Letters A, B, C, and D represent locations on a bar magnet. Which location has the greatest magnetic force?

2 answers:

WITCHER [35]3 years ago

8 0

I have to go with letter B

denis-greek [22]3 years ago

6 0

I'd say D. Here is why.

The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole<span> compared with the </span>south pole<span>. The force is weaker in the middle of the magnet and halfway between the pole and the center. So that means that the south and/or north poles have the strongest magnetic field.</span>

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4 years ago

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3 years ago

Represent 7468 N with SI units having an appropriate prefix. Express your answer to four significant figures and include the app

sergeinik [125]

Answer:

7.468 kN

Explanation:

Here the force of 7468 Newton is given.

Some of the prefixes of the SI units are

kilo = 10³

Mega = 10⁶

Giga = 10⁹

The number is 7468.0

Here, the only solution where the number of significant figures is kilo

1 kilonewton = 1000 Newton

$1\ Newton=\frac{1}{1000}\ kilonewton$

$\\\Rightarrow 7468\ Newton=\frac{7468}{1000}\ kilonewton\\ =7.468\ kilonewton$

So 7468 N = 7.468 kN

3 0

3 years ago

Without the wheels, a bicycle frame has a mass of 6.71 kg. Each of the wheels can be roughly modeled as a uniform solid disk wit

dalvyx [7]

Answer:43.311 J

Explanation:

Given

mass of frame $\left ( m_f\right )=6.71 kg$

mass of wheel $\left ( m_w\right )=0.820 kg$

radius of wheel $\left ( r\right )=0.343 m$

v=3.22 m/s

Moment of inertia of each wheel\left ( I\right )=\frac{1}{2}mr^2[/tex]

$I=0.0482 kg-m^2$

kinetic Energy of whole cycle=Kinetic energy of wheels and frame+rotational energy of Wheels

$K.E.=\frac{1}{2}\left ( m_f+m_w\right )v^2+2\times \frac{1}{2}I\omega ^2$

$K.E.=\frac{1}{2}\left ( 6.71+0.820\right )3.22^2+2\times \frac{1}{2}0.0482\times \left ( \frac{3.22}{0.343}\right )^2$

K.E.=39.037+4.274=43.311J

4 0

3 years ago