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Anuta_ua [19.1K]
4 years ago
8

In an iron rod the particles vibrate. If one end of an iron rod is heated, the vibrating particles transfer energy to neighborin

g particles which are not vibrating so violently.
What is this process called?
Physics
1 answer:
dalvyx [7]4 years ago
6 0

Answer:

Conduction

Explanation:

Conduction. When a substance is heated, its particles gain internal energy and move more vigorously. The particles bump into nearby particles and make them vibrate more. This passes internal energy through the substance by conduction , from the hot end to the cold end.

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Which list places the layers of the sun in the correct order from innermost to outermost?
LiRa [457]

Answer:

Convective zone, chromosphere, corona

Explanation:

A star like the Sun is divided into different layers according to pressure, density, temperature, and the mechanics of energy transport (in the case of the convective zone and radiative zone) for each of those layers.

In stars, there is an equilibrium between two forces, the force of gravity in the inward direction due to their own mass and the radiation pressure in the upward direction as a consequence of the nuclear reaction in their core, that is known as hydrostatic equilibrium.

That leads to different layers according with the properties described above.    

       

Near the core, in the Sun, there is a radiative zone since radiation is the best mechanism of energy transport in this area. Then, in the next layer, it can be found that convection becomes a more efficient way of energy transport that radiation due to the fact that the inner part of the convection zone is at a greater temperature than the outer one.    

Finally, there is the atmosphere of the Sun (chromosphere, photosphere, and corona).

                                       

Key terms:        

Convection: Transport of energy due to different in density and temperature of a material (liquid, gas).    

     

4 0
4 years ago
Read 2 more answers
Vascular plants can be divided into three categories. These categories are
Evgesh-ka [11]
I believe the answer here is <span>C).seedless, seed (nonflowering), and seed (flowering).</span><span>
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6 0
4 years ago
When a beta minus decay occurs in an unstable nucleus, what happens to the atomic number of the nucleus?The atomic number increa
WITCHER [35]

Answer:

The atomic number increases by 1.

Explanation:

The beta minus decay is a process in which a neutron decays into a proton, emitting an electron and an anti-neutrino:

n \rightarrow p + e + \bar{\nu}

If this process occurs inside an unstable nucleus, we notice that:

- a neutron is converted into a proton, therefore

- the number of neutrons decreases by 1 and the number of protons increases by 1

Keep in mind that the atomic number of a nucleus corresponds to the number of protons it contains: therefore, since this number increases by 1, then the atomic number increases by 1.

6 0
3 years ago
A 28.0 kg child plays on a swing having support ropes that are 2.30 m long. A friend pulls her back until the ropes are 45.0 ∘ f
Dimas [21]

Answer

A)184.9J

B)=3.63m/s

C) Zero

Explanation:

A)potential energy of the child at the initial position, measured relative the her potential energy at the bottom of the motion, is

U=Mgh

Where m=28kg

g= 9.8m/s

h= difference in height between the initial position and the bottom position

We are told that the rope is L = 2.30 m long and inclined at 45.0° from the vertical

h=L-Lcos(x)= L(1-cosx)=2.30(1-cos45)

=0.674m

Her Potential Energy will now

= 28× 9.8×0.674

=184.9J

B)we can see that at the bottom of the motion, all the initial potential energy of the child has been converted into kinetic energy:

E= 0.5mv^2

where

m = 28.0 kg is the mass of the child

v is the speed of the child at the bottom position

Solving the equation for v, we find

V=√2k/m

V=√(2×184.9/28

=3.63m/s

C)we can find work done by the tension in the rope is given using expresion below

W= Tdcosx

where W= work done

T is the tension

d = displacement of the child

x= angle between the directions of T and d

In this situation, we have that the tension in the rope, T, is always perpendicular to the displacement of the child, d. x= 90∘ and cos90∘=0 hence, the work done is zero.

6 0
3 years ago
A solar cell that transforms 300 J of light energy into 45 J of electrical energy and 255 J of wasted energy. whats the efficien
Setler [38]

Answer:

15%

Explanation:

Step one:

Given data

Energy source= 300J

Useful energy = 45J

Waste energy = 255J

Required

The efficiency of the solar system

Step two:

The efficiency is computed by factoring only the useful work and the energy source

Efficiency= 45/300*100

Efficiency= 0.15*100

Efficiency= 15%

3 0
3 years ago
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