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kykrilka [37]
3 years ago
14

Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tig

htly wound with a single layer of 2.50-mm-diameter superconducting wire.
What current is needed?
Physics
1 answer:
Andru [333]3 years ago
5 0
I=2.27 x 10 to the 3rd power A
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A skater rotates with her arms crossed at an angular speed of 8.0 rad/s and she has a moment of inertia of 100 kg/m2. She extend
solong [7]

Answer:

When her hands extends, her momen of inertia is 4.28\ kg-m^2.

Explanation:

Given that,

Initial angular speed, \omega_i=8\ rad/s

Initial moment of inertia, I_1=100\ kg-m^2

Final angular speed, \omega_f=7\ rad/s

Initially, a skater rotates with her arms crossed and finally she extends her arms. The momentum remains conserved. Using the conservation of momentum as :

I_1\omega_1=I_2\omega_2

I_2 is final moment of inertia

I_2=\dfrac{I_1\omega_1}{\omega_2}\\\\I_2=\dfrac{100\times 8}{7}\\\\I_2=114.28\ kg-m^2

So, when her hands extends, her momen of inertia is 4.28\ kg-m^2. Hence, this is the required solution.

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3 years ago
Discuss five occasions when people dance ​
Xelga [282]

Answer:

Party, Birthday, Weddings, Nightclub, Just for fun

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3 years ago
Please help me important will give brainliest
irinina [24]
Pretty sure it’s C. all the others are speeding up. acceleration means gradually (over time) getting faster. So it’s C.
7 0
3 years ago
PLEASE HELP!!!!!!
Helga [31]
Hey there,

Density = Mass/Valume

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3 0
3 years ago
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A 6.0-v battery maintains the electrical potential difference between two parallel metal plates separated by 1.0 mm. what is the
Gnoma [55]
The voltage<span> difference between the two plates can be expressed in terms of the </span>work<span> done on a positive test charge q when it moves from the positive to the negative plate.</span><span>
E=V/d
where V is the voltage and d is the distance between the plates.
 
So,

E=6.0V/1mm= 6000 V/m. The electric field between the plates is 6000 V/m.</span>
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3 years ago
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