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lawyer [7]
3 years ago
13

A maglev train can “float” because magnets in the bottom of the train and on the guideway...

Physics
1 answer:
miss Akunina [59]3 years ago
4 0
C. Have like poles that repel each other
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Two +1 C charges are separated by 30000 m, what is the magnitude of<br> the force?
Kipish [7]

Answer:

<em>The magnitude of the force is 10 N</em>

Explanation:

<u>Coulomb's Law</u>

The electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between the two objects.

Written as a formula:

\displaystyle F=k\frac{q_1q_2}{d^2}

Where:

k=9\cdot 10^9\ N.m^2/c^2

q1, q2 = the objects' charge

d= The distance between the objects

We have two identical charges of q1=q2=1 c separated by d=30000 m, thus the magnitude of the force is:

\displaystyle F=9\cdot 10^9\frac{1*1}{30000^2}

\displaystyle F=9\cdot 10^9\frac{1*1}{30000^2}

F = 10 N

The magnitude of the force is 10 N

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3 years ago
What is not an example of Absorption? (Physics)
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When a light wave strikes an object, it can be absorbed, reflected, or refracted by the object. All objects have a degree of reflection and absorption. ... In the natural world, light can also be transmitted by an object. That is, light can pass through an object with no effect (an x-ray, for example).

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Properties seen when one substance changes to another are know as ____ properties
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Answer: chemical property

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Uma wants to recreate the discovery of superconductivity. Which describes the materials needed?
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B)a tool to drop temperatures, mercury, an electric current, and a tool to measure resistance

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