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cestrela7 [59]
3 years ago
11

What are the difference between conductor and insulator? ​

Physics
1 answer:
Anvisha [2.4K]3 years ago
5 0

Answer:

  • A conductor allows energy e.g. electric charge or heat to pass through it easily. While an insulator does not let electric current or heat to travel through it.
  • Insulators have strong molecular bonds. While molecular bonds are very weak in conductors.
  • Insulators have very low conductivity. While in conductors, it is very high.
  • Insulators have a very high resistance and therefore the electrons are held together very firmly. The conductors, on the other hand, have a very low resistance.
  • Insulators do not have any electric field, neither inside nor on the surface. While in conductors, it is found on the surface and continues to be zero in the inner part of the conductor.
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The Doppler effect refers to the frequency as perceived by _________. A. the source of the waves B. an observer of the waves who
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The answer you are looking for is B, hope this helps.
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3 years ago
What is an example of a sting nuclear force ?
slavikrds [6]

Answer:

A.) stability of an atom

Explanation:

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Simple diffusion and facilitated diffusion are related in that both
kaheart [24]

Answer:

allow the downward movement of the concentration gradient by passive transport

Explanation:

Passive transport is a process of substance transport, which is carried out spontaneously, without energy expenditure and in favor of the concentration gradient, that is, from a medium where the molecules are more concentrated towards a medium where their concentration is lower.

Three types of passive transport are distinguished: osmosis, simple diffusion and facilitated diffusion

<u>Simple diffusion</u>

It is the passage, through the plasma membrane, of small molecules without charge soluble in the lipid bilayer, such as some gases (oxygen and carbon dioxide). For a molecule to diffuse through the membrane it is necessary that there is a difference in concentration between the external and the internal environment.

<u>Diffusion facilitated </u>

There are molecules such as amino acids, glucose and small ions that, due to their chemical and size characteristics, cannot diffuse through the lipid bilayer and require transport proteins for diffusion.

The transport proteins are immersed in the plasma membrane and can be of two types: protein channels, formed by proteins that generate a channel in the membrane, and permeases, which are proteins that, when joined to the molecule to be transported, change their shape by carrying them into the cell.

4 0
3 years ago
Consult Multiple-Concept Example 5 for insight into solving this problem. A skier slides horizontally along the snow for a dista
antoniya [11.8K]

The initial velocity of the skier is 4.5 m/s

Explanation:

There is only one force acting on the skier in the horizontal direction, and it is the force of friction, whose magnitude is

F_f = -\mu_k mg

where

\mu_k = 0.050 is the coefficient of kinetic friction

m is the mass of the skier

g=9.8 m/s^2 is the acceleration of gravity

The negative sign is due to the fact that the direction of the force of friction is opposite to the direction of motion of the skier.

According to Newton's second law, the net force acting on the skier is equal to the product between his mass and his acceleration, so we can write:

F=ma\\ \rightarrow -\mu_k mg = ma

So, the acceleration of the skier is

a=-\mu_k g

Now we can apply the following suvat equation to find the initial velocity of the skier:

v^2-u^2=2as

where

v = 0 is the final velocity (he comes to a stop)

u is the initial velocity

s = 21 m is the displacement

a is the acceleration

Substituting the equation for the acceleration and solving for u, we find

u=\sqrt{v^2-2as}=\sqrt{-2(-\mu_k g) s}=\sqrt{2(0.050)(9.8)(21)}=4.5 m/s

Learn more about accelerated motion here:

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5 0
3 years ago
which of the following best describes the amount of natural resources found here in the united states. coal is the only natural
Lelu [443]

Natural resources are found in abundance in the US.

Explanation:

The United States boasts of rich renewable and non-renewable natural sources.

Land: Large landmass is a huge advantage and being under one nation or government leads to great industrial, agricultural and economic development

  • Farmland: America boasts huge farmlands where mechanized agriculture is done on a large scale
  • Minerals: A number of minerals like copper, gold, iron ore, coal etc are found in abundance
  • Forests: The rich and different types of forests found in North America provides huge resources of timber

Water: The large coastline, huge lakes, and rivers all form a great resource for fishing, water recreational activities, oil drilling and other industries.

Energy sources: The U.S. is rich with energy sources like coal, oil, petroleum, and natural gas. Mining, especially of coal, is one of the chief industries in the U.S. The U.S. is a key oil producer in the World.

4 0
3 years ago
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