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Tasya [4]
2 years ago
12

What current is needed in the solenoid's wires?

Physics
1 answer:
marta [7]2 years ago
5 0
Using Ampere's Law, the magnetic field produced inside this solenoid is given by
B = uo N I / h
where uo is the vacuum permeability, N is the number of turns in the solenoid and h is the length of the solenoid. Earth's magnetic field is around 50 microteslas in North America thus the current needed in the solenoid is
I = B h / (uo N) = (50 E-6 ) (4) / ((4 pi E-7)(6000) ) = 0.026 A
I = 26 mA
So you need a current of around 26 mA.
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An object travels 20 m in 4 s heading south. What is it’s velocity?
vodka [1.7K]

Answer:

5 miles a second

Explanation:

20 divided by 4

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3 years ago
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Calculate the force of gravity on the same 1 kg mass if it were 6.4x10^6 m above earth's surface
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The force of gravity on a certain object is calculated through the equation,
 
   F = Gm1m2 / r²

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   F = (6.67 x 10⁻¹¹ N.m²/kg²)(1 kg)(5.98 x 10²⁴ kg)/ (6.4 x 10⁶ m)²

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2 years ago
Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decreas
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3 years ago
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Describe all of the forces acting on the ice cream in the root beer float. Relate these forces to the fact that the ice cream is
Tasya [4]

Answer:

Sample Response:

Explanation:

The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward. The ice cream floats because the buoyant force is greater than the weight of the ice cream.

What did you include in your response? Check all that apply.  

The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out.  

Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream.  

Buoyant force pushes the ice cream upward.

The ice cream floats because the buoyant force is greater than the weight of the ice cream.

8 0
2 years ago
ESSAY: PROPHECY
kogti [31]

The two Old Testament chapters filled with prophecies concerning Jesus Christ are:

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Micah 5:2L Here, Micah was said to have prophesies that Jesus will be born in a town that is called  Bethlehem.

<h3>What is the message of Isaiah 9?</h3>

The kind of message is one that can be seen mostly in Isaiah 9:1-7. Isaiah  was known to be a prophet who was said to have announced that there is what we see presently gloom and distress and there a time will arise or come to pass when there will be happiness, joy and salvation.

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Learn more about prophecies from

brainly.com/question/14032462

#SPJ1

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