3 years ago

Pulling a rubber band back and then letting it fly across the room is an example of

Physics

1 answer:

Cloud [144]3 years ago

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Answer:

Explanation:

because a elastic band uses elastic energy

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Answer:

The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.

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2 years ago

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lbvjy [14]

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2 years ago

3. The main difference between speed and velocity involves

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3 years ago

A loop of wire is carrying current of 2 A . The radius of the loop is 0.4 m. What is the magnetic field at a distance 0.09 m alo

HACTEHA [7]

Answer:

$B=2.91\ \mu T$

Explanation:

Given that,

The current in the loop, I = 2 A

The radius of the loop, r = 0.4 m

We need to find the magnetic field at a distance 0.09 m along the axis and above the center of the loop. The formula for the magnetic field at some distance is given as follows :

$B=\dfrac{\mu_o}{4\pi }\dfrac{2\pi r^2 I}{(r^2+d^2)^{3/2}}$

Put all the values,

$B=10^{-7}\times \dfrac{2\pi \times 0.4^2 \times 2}{(0.4^2+0.09^2)^{3/2}}\\\\=2.91\times 10^{-6}\ T\\\\or\\\\B=2.91\ \mu T$

So, the required magnetic field is equal to $2.91\ \mu T$ .

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2 years ago

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