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
Fittoniya [83]
3 years ago
6

find the length of nichrome wire of resistivity 100*10-6ohm-m of cross section 1mm ²to yield a resistance of 10 ohm​

Physics
1 answer:
Burka [1]3 years ago
8 0

1 x 10⁻¹¹m²

Explanation:

Given parameters:

Resistivity = 100 x 10⁻⁶Ohm.m

Cross-section = 1mm²

Resistance = 10ohm

Unknown:

length of the nichrome wire = ?

Solution:

To find the length of the nichrome wire, we use the expression below:

       L = \frac{RA}{P}

where l is the length of the wire

          R is the resistance of the wire

            A is the area

             p is the resistivity

Now we need to convert area from mm to m;

     1000mm = 1 m

  1mm² = 1 x \frac{1m}{1000mm}  x \frac{1m}{1000mm} = 1 x  10⁻⁶m²

Input the values in the formula;

   L = \frac{100 x 10^{-6} x 1 x 10^{-6} }{10} = 1 x 10⁻¹¹m²

learn more:

Resistivity brainly.com/question/12246020

#learnwithBrainly

You might be interested in
Which way does the friction arrow go in a free body diagram for a moving object point
True [87]

Answer:

Frictional force opposes relative motion between surfaces

Explanation:

Friction that exists when the object is not moving is called static friction.  In static friction ,If we are applying a force in the object the frictional force is in the opposite  direction . If it is not the case, there have been some net force and the object starts accelarating.

The main component of the contact force of two objects is normal force and that is in the perpendicular direction.  Frictional force is other complnent. This frictional force is parallel to the interface between objects. Frictional force opposes relative motion between surfaces.

7 0
3 years ago
Read 2 more answers
A gram is the basic metric unit for measuring which of the following?
DanielleElmas [232]
Gram is used for measuring weight
7 0
3 years ago
Read 2 more answers
The speed of a star, can you measure it? Is it constant?
natka813 [3]

Explanation:

the spped of that we can't measure with own that measure a machine is called

8 0
2 years ago
Chan Hee is inflating a basketball using an air pump. He notices that the pump gets warm as he uses it. What is a good hypothesi
likoan [24]

"If air in a pump is squeezed more, then the air gets hotter because energy is added to it" is a good hypothesis that could lead to new experimentation.

<u>Option: C</u>

<u>Explanation:</u>

If we use a pump to inflate a basketball, we initially pull the handle to draw air to fill the sphere in. As we move it down we apply a great deal of force to pump in air through the pin's tiny hole because of this resistance force in the air we find the tube warmed.

A needle of ball pump is a metal tube in which air, from an inflating pump to a sports ball, moves through it. In continuous-flow operation, pumps are often used and built to produce comparatively little pressure towards a free-flowing environment with limited back pressure. Such pumps have a fixed configuration and work freely along their power curve as circumstances change.

8 0
3 years ago
A crane lifts a 425 kg steel beam vertically upward a distance of 66 m. How much work does the crane do on the beam if the beam
iogann1982 [59]

Answer:

W = 311074.5 [J]

Explanation:

In order to solve this problem we must analyze two parts, in the first part by means of Newton's second law we can determine the acceleration of the beam, remembering that the sum of the forces is equal to the product of mass by acceleration.

∑F = m*a

F = forces acting on the beam [N]

m = mass = 425 [kg]

a = acceleration = 1.8 [m/s²]

The forces acting on the beam are the force of the crane up (positive) and the weight of the beam down (negative)

F_{crane}-(425*9.81)= 425*1.8\\F_{crane}=4713.25 [N]

Now in the second part, we use the definition of work, which is equal to the product of the force applied in the direction of displacement, that is, the product of force by distance.

W=F*d

where:

W = work [J]

F = force = 4713.25 [N]

d = distance = 66 [m]

W=4713.25*66\\W=311074.5[J]

5 0
3 years ago
Other questions:
  • How can non visible radiation be used
    8·2 answers
  • Logs sometimes float vertically in a lake because one end has become water-logged and denser than the other. What is the average
    5·1 answer
  • A solid disk of mass m1 = 9.3 kg and radius R = 0.22 m is rotating with a constant angular velocity of ω = 31 rad/s. A thin rect
    10·1 answer
  • 04-9 (ML 6.12) A pristine stream flowing at 100 cubic feet per second (cfs) in the Rocky Mountains contains 5 mg/L of suspended
    5·1 answer
  • A space station that does not rotate cannot simulate gravity for its occupants.
    10·1 answer
  • How does social theory learning impact on children​
    10·1 answer
  • If a net force of 20 N is applied to a mass of 4kg, what is the acceleration​
    15·1 answer
  • Which of the following is a Nobel gas?<br> Ba2+<br> OA<br> OB. Ci<br> Kr<br> Ос.<br> Ca<br> D.
    8·1 answer
  • A pendulum has a mass of 0.060 kg swinging at a small angle from a light string, with a period of 1.4 s. What is the length of t
    15·2 answers
  • The displacement of a wave from the baseline.this affects thrloudness of sound
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!