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MakcuM [25]
2 years ago
5

What is characteristic of a good insulator?

Physics
2 answers:
Aneli [31]2 years ago
7 0

Answer:

Explanation:

D, when electrons are not free to move.. the material is a good insulator

melamori03 [73]2 years ago
7 0

Answer:

D. Electrons are tightly bound to the nuclei.

Explanation:

In an insulator, the electrons of the outer most shell are bound with a very high electrostatic forces coming from the nucleus of each atom so electrons cannot flow around all atoms making up the material as in a conductor.

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3. Electrons are the only part of an atom that can be transferred between materials. True or
meriva

<em>False</em>

Explanation:

The electrons cloud patterns are extremely complex and is of no importance to the discussion of electric charge in the atom. More important is the fact that electrons are labile; that is, they can be <em>transferred</em> from one atom to the next. It is through electronic transfer that atoms become charged.

6 0
3 years ago
Read 2 more answers
You need to fill a basketball with air to play with it. You know that your pump expels air at a velocity of 6 cm/s. You know tha
Scrat [10]

Answer:

The diameter of the needle is <u>4.675 cm</u>.

Explanation:

Given:

Volume flow rate is, \dot V=103\ cm^3

Velocity of air expelled by pump is, v=6\ cm/s

Let the area of the needle be 'A' cm² and the diameter be 'd' cm.

We know that, volume flow rate of the air expelled by pump is given as the product of the needle's area and velocity of air flowing through that area.

Therefore, volume flow rate is given as:

\dot V=A\times v\\\\103=A\times 6\\\\6A=103\\\\A=\frac{103}{6}\ cm^2

Now, considering the needle to be circular, area of the needle can be written as:

A=\frac{\pi}{4}\times d^2\\\\\frac{103}{6}=\frac{\pi}{4}\times d^2\\\\d^2=\frac{103\times 4}{6\pi}\\\\d=\sqrt{\frac{103\times 4}{6\pi}}\\\\d=4.675\ cm

Therefore, the diameter of the needle is 4.675 cm.

8 0
3 years ago
What term best describes seawater?
Kisachek [45]
Since you didn't tell us the choices, I can pick anything I like.

The one that always does it for me is  " foaming brine " .
4 0
3 years ago
Read 2 more answers
A driver fills an 18.9L steel gasoline can with gasoline at 15.0°C right up to the top. He forgets to replace the cap and leaves
GarryVolchara [31]

Answer:

ΔV = 0.98 L

Explanation:

First, we will calculate the increased volume using Charles' Law:

\frac{V_1}{T_1} = \frac{V_2}{T_2}

where,

V₁ =initial volume = 18.9 L

V₂ = final volume = ?

T₁ = initial temperature = 15°C + 273 = 288 k

T₂ = final temperature = 30°C + 273 = 303 k

Therefore,

\frac{18.9\ L}{288\ k} = \frac{V_2}{303\ k}

V₂ = 19.88 L

Now, we calculate the change in volume:

ΔV = V₂ - V₁ =  19.88L - 18.9 L

<u>ΔV = 0.98 L</u>

This is the volume of gasoline that will spill out.

5 0
2 years ago
How many newtons of force are represented by the following amount: 3 kg.m/sec2
alekssr [168]
I believe the answer is 3 Newtons!
5 0
3 years ago
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