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
Arturiano [62]
3 years ago
11

A classic demonstration illustrating eddy currents is performed by dropping a permanent magnet inside a conducting cylinder. The

magnet does not go into free fall. Instead it reaches terminal velocity and can take a few seconds to drop a length of about a meter. Suppose the mass of the magnet is 70 g and width of 1.0 cm. It falls with a terminal velocity of 10 cm/s and the length of the pipe is 80 cm. The magnitude of the Joule heating from the eddy currents is approximately:________
Physics
1 answer:
kvv77 [185]3 years ago
4 0

Answer:

The correct solution is "0.69 N".

Explanation:

The given values are:

Mass of magnet,

m = 70 g

or,

   = 0.07 kg

Width,

= 1.0 cm

Velocity,

= 10 cm/s

Length of the pipe,

= 80 cm

Whenever the velocity is constant, then the net force which is acting on the magnet will be "0".

On the magnet,

The up-ward force will be:

⇒  F=mg

On substituting the values, we get

⇒      =0.07\times 9.8

⇒      =0.69 \ N

You might be interested in
Prob. 3: Manifestation of quantum phenomena (total 25 points) (a)-(e) 5 points each.
TEA [102]

Answer:

3A. This phenomenon can be seen in the discrete emission of the molecules.

3B. The emotion of the atoms is observed, from states high in energy to a state of minimum energy that is stable indefinitely.

3C. When an electron beam passes through an inhomogeneous magnetic field, it is divided into only two beams

3D. This is due to the stimulated emission

3E. The penetration of a potential barrier is observed in the radioactive emission of heavy atoms, where an alpha particle (Helium nucleus)

Explanation:

This problem asks for some experimental explanations of various quantum phenomena.

3A. This phenomenon can be seen in the discrete emission of the molecules.

In the classical explanation all states or energies are allowed, therefore when emitting energy (photons) there should be a continuum, this is not observed

In the correct quantum explanation only some states are allowed, therefore the emission must be discrete, which is observed in the emission or absorption of molecules and atoms

3B. The emotion of the atoms is observed, from states high in energy to a state of minimum energy that is stable indefinitely.

The incorrect classical explanation that if the minimum energy was zero the electrons cannot rotate around the nuclei and the atom collapses, this does not happen

3C. When an electron beam passes through an inhomogeneous magnetic field, it is divided into only two beams, which is evidence of the existence of two discrete states that we call spin, remember that a free electron beam has zero angular momentum.

3D. This is due to the stimulated emission that occurs when a photon passes through the emission zone, causing the atoms to have transitions and these emitted photons have the same initial photon location, the laser beam all photons are in phase and therefore it is coherent .

This is widely used for holographic and interference work

3E. The penetration of a potential barrier is observed in the radioactive emission of heavy atoms, where an alpha particle (Helium nucleus) leaves the atomic nucleus penetrating the barrier since its energy is lower than the nuclear barrier potential.

6 0
2 years ago
Question 8 of 10
Marrrta [24]

Answer:

C

Explanation:

If the theory were to be proved you you need to repeat the experiment over and over again so that way you can prove that it is true wuth the same results.

3 0
3 years ago
Read 2 more answers
in which of the exercise and sports science do specialist study achievement motivation , arousal attribution and personality dev
Mekhanik [1.2K]

Sport and exercise psychology

Explanation:

Here you study the psychological factors that  are connected to your performance and contribution to sport, exercises and physical activities.Through application of psychological principles you can attain higher mental health  and your performance will be enhanced. For example, you will be able to recognize times when you experience emotional states without without knowing the reasons or causes which is a concept of arousal attribution.Understanding your pattern of behavior and attitude builds up your personality making you distinctive.

Learn More

Sports and exercise psychology :brainly.com/question/1213874

Keywords : exercise, sports science, study , achievement motivation, arousal attribution, personal development.

#LearnwithBrainly

7 0
3 years ago
Which of the following statements best describe the frequency of a wave?
Brrunno [24]

Answer:

I believe the answer is B.

6 0
3 years ago
A basketball player passes a ball to a teammate at a velocity of 6 m/s. The ball has a mass of 0.51 kg. If the original player h
Vilka [71]

We can solve the problem by using conservation of momentum.

The player + ball system is an isolated system (there is no net force on it), therefore the total momentum must be conserved. Assuming the player is initially at rest with the ball, the total initial momentum is zero:

p_i = 0

The total final momentum is:

p_f = p_p + p_b

where p_p is the momentum of the player and p_b is the momentum of the ball.

The momentum of the ball is: p_b = mv=(0.51 kg)(6 m/s)=3.06 kg m/s

While the momentum of the player is: p_p = Mv_p, where M=59 kg is the player's mass and vp is his velocity. Since momentum must be conserved,

p_f = p_i = 0

so we can write

p_f = Mv_p + p_b =0

and we find

v_p = -\frac{p_b}{M}=-\frac{3.06 kg m/s}{59 kg}=-0.052 m/s

and the negative sign means that it is in the opposite direction of the ball.

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the magnitude of velocity called?
    11·1 answer
  • What is the magnitude of the electric force between two point charges with Q1 = -1.5 C and Q2 = 0.8 C at a distance of 1 km?
    14·1 answer
  • Prehistory can be described as _____.
    8·1 answer
  • Three common elements that can reorient their electrons into magnetic domains and become magnetic are iron, nickel, and ________
    9·1 answer
  • 1. A 100-kg crate is pulled across a warehouse floor using a rope with a force of 250 N at an angle of 45o from the horizontal.
    12·1 answer
  • g Which of the following wavefunctions are: a) square-integrable on the interval provided (1 point); b) valid wavefunction satis
    7·1 answer
  • How fast is a wave traveling if it has a wavelength of 7 meters and a frequency of 11 Hz?
    9·1 answer
  • 2. A loop of wire of area 0.7 m is moving into a 0.9 T magnetic field. If it takes 5
    14·1 answer
  • The picture to the right shows which wave behavior?
    15·2 answers
  • A proton moves a distance 10 cm in a uniform electric field of 3.5 kN C, in the direction of the field.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!