1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mariana [72]
3 years ago
15

How many turns should a solenoid of cross-sectional area 3.3×10−2 m2 and length 0.30 m have if its inductance is to be 47 mh ?

Physics
1 answer:
Nikitich [7]3 years ago
4 0
The inductance of a solenoid is given by
L=\mu  \frac{N^2}{l} A
where
\mu = 12.56 \cdot 10^{-7}NA^{-2} is the magnetic permittivity
N is the number of turns of the solenoid
l is its lenght
A is its cross-sectional area

By re-arranging the formula and replacing the numbers, we get the number of turns of the solenoid:
N= \sqrt{ \frac{lL}{\mu A} }= \sqrt{ \frac{(4.7\cdot 10^{-3}H)(0.3 m)}{(12.56\cdot 10^{-7}NA^{-2})(3.3\cdot10^{-2}m^2)} }  =583
You might be interested in
Can someone please help me ASAP!
Artist 52 [7]
I’m not 100% sure but i think it’s A because if you divide the speed by the time you get 2 and also all the other answer choices don’t make any sense!
3 0
3 years ago
The spring is unstretched at the position x = 0. under the action of a force p, the cart moves from the initial position x1 = -8
hammer [34]
Missing figure and missing details can be found here:
<span>http://d2vlcm61l7u1fs.cloudfront.net/media%2Fdd5%2Fdd5b98eb-b147-41c4-b2c8-ab75a78baf37%2FphpEgdSbC....
</span>
Solution:
(a) The work done by the spring is given by
W= \frac{1}{2} k (\Delta x)^2 &#10;
where k is the elastic constant of the spring and \Delta x is the stretch between the initial and final position. Since x1=-8 in=-0.203 m and x2=5 in=0.127 m, we have
W= \frac{1}{2} \cdot 500 N/m \cdot (0.127m-(-0.203m))^2=27.25 J

(b) The work done by the weight is the product of the component of the weight parallel to the inclined plane and the displacement of the cart:
W_W = -F_{//} (x_2 -x_1)
where  the negative sign is given by the fact that F_{//} points in the opposite direction of the displacement of the cart, and where
F_{//}=m g sin 15^{\circ}=6 kg \cdot 9.81m/s^2 \cdot sin 15^{\circ}=15.2 N
therefore, the work done by the weight is
W_W=-15.2 N \cdot (0.203m-(-0.127m))=-5.02 J

8 0
3 years ago
Explain why the<br> ball looks red<br> under normal<br> light.
allochka39001 [22]
That’s the color of the ball?
6 0
3 years ago
YO CAN ANYONE DO THE BLANK COLUMN AND THE QUESTION PART RQ PLS!!
VikaD [51]

Answer:

stryo:  1

wood: 1

ice: 1

brick: 2

aluminum: 2.7

Explanation:

d= mass/ total volume

(fyi: for aluminum, they did the subtraction wrong to find the total volume. it is actually 5 or 5.00)

6 0
3 years ago
Newton’s third law of motion says that for every action there is a(n) and opposite reaction.
sattari [20]

Answer:

for every action thete is an equal and opposite reaction

3 0
3 years ago
Other questions:
  • Which factor varies between the isotopes of an element?
    5·2 answers
  • This is an example of using a hammer as a(n)
    7·2 answers
  • In addition to births and deaths what else can influence the population growth rate ?
    10·1 answer
  • A marble slides without friction in a vertical loop around the inside of a smooth, 28.6 cm diameter horizontal pipe. The marble'
    12·1 answer
  • Which has higher resistence a 50W lamp bulb or a 25W lamp​ which greater resistance
    11·1 answer
  • You kick a soccer ball with a speed of 18 m/s at an angle of 43. How long does it take the the ball to reach the top of its traj
    5·1 answer
  • Please help fast
    11·1 answer
  • What relates the net force exerted on an object to its mass and acceleration?
    15·1 answer
  • Can you help me with a science test
    6·2 answers
  • The engines of airplanes are made of materials called superalloys. Do some
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!