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GarryVolchara [31]
4 years ago
15

Which statements best characterize conductors? Check all that apply.

Physics
2 answers:
romanna [79]4 years ago
5 0
It would be the first one and the third one
lidiya [134]4 years ago
5 0

Answer:

Conductors allow electricity to easily move through them.  

Metal is an example of a conductor.  

Explanation:

Conductors are materials that have free electrons, so they allow electrical currents (which are made of electrons traveling) passing through them.

Let's analyze each statement separately:

- Conductors allow electricity to easily move through them.  --> TRUE: conductors allow electrical currents to pass through them.

- Glass is an example of a conductor.  --> FALSE: glass is an example of insulator (insulators are materials that do not allow the flow of current)

- Metal is an example of a conductor.   --> TRUE: metals are generally good conductors of electricity, since they have many free electrons.

- Conductors do not allow electricity to easily move through them.   --> FALSE: it's actually the opposite, conductors allow electricity to easily move through them.

- Conductors restrict the flow of thermal energy. --> FALSE: conductors are generally also good conductors of thermal energy, so they do not restrict the flow of thermal energy.

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Answer:

kinetic

Explanation:

i just remember it from last year

6 0
3 years ago
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The most recently discovered system close to Earth is a pair of brown dwarfs known as Luhman 16. It has a distance of 6.5 light-
just olya [345]

Answer:

1.99 parsecs.

Explanation:

We have been given that the most recently discovered system close to Earth is a pair of brown dwarfs known as Luhman 16. It has a distance of 6.5 light-years.

We know that one light year equals to 0.306601 parsecs. To convert 6.5 light-years to parsecs, we will multiply 0.306601 by 6.5.

6.5\text{ Light-years}=6.5\times 0.306601\text{ Parsecs}

6.5\text{ Light-years}=1.9929065\text{ Parsecs}

6.5\text{ Light-years}\approx 1.99\text{ Parsecs}

Therefore, Luhman 16 is approximately 1.99 parsecs away from the Earth.

5 0
3 years ago
The engine of a locomotive exerts a constant force of 8.1*10^5 N to accelerate a train to 68 km/h. Determine the time (in min) t
Bumek [7]

Answer:443.1 s

Explanation:

Given

Engine of a locomotive exerts a force of 8.1\times 10^5 N

Mass of train=1.9\times 10^7

Final speed (v)=68 km/h \approx 18.88 m/s

F=ma

so acceleration(a) =\frac{F}{m}=\frac{8.1\times 10^5}{1.9\times 10^7}

a=0.042631 m/s^2

and acceleration is

a=\frac{v-u}{t}

0.042631=\frac{18.88-0}{t}

t=443.089 \approx 443.1 s

8 0
3 years ago
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An object is dropped from rest from a 70.6 m tower. Air resistance is negligible. After 0.32 seconds, what is magnitude and dire
dem82 [27]

Answer:

<em>1,378.9ms²</em>

Explanation:

Given the following

Distance S = 70.6m

Time t = 0.32secs

Initial velocity = 0m/s

Required

Acceleration

Using the equation of motion

S = ut+1/2at²

Substitute

70.6 = 0+1/2a(0.32)²

70.6 = 0.0512a

a = 70.6/0.0512

a = 1,378.9

<em>Hence the acceleration is 1,378.9ms²</em>

7 0
3 years ago
Which of the following statements is NOT a correct assumption of the classicalmodel of an ideal gas?A. The molecules are in rand
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The answer is D, because the collision's between molecules are elastic, not inelastic.

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