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3 years ago

Which of the following is a conductor for electricity?

Physics

2 answers:

oksian1 [2.3K]3 years ago

5 0

Water conducts electricity

Aleks [24]3 years ago

3 0

The answer is water!

Water is a wonderful conductor of electricity; while wood and wool are not very good and rubber doesn't allow any currents through it.

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Billy drops a ball from a height of 1 m. The ball bounces back to a height of 0.8 m, then

Andreas93 [3]

Answer:

The displacement is $\Delta H = - 1 \ m$

The distance is $D = 4 \ m$

Explanation:

From the question we are told that

The height from which the ball is dropped is $h = 1 \ m$

The height attained at the first bounce is $h_1 = 0.8 \ m$

The height attained at the second bounce is $h_2 = 0.5 \ m$

The height attained at the third bounce is $h_3 = 0.2 \ m$

Note : When calculating displacement we consider the direction of motion

Generally given that upward is positive the total displacement of the ball is mathematically represented as

$\Delta H = (0 - h ) + ( h_1 - h_1 ) + (h_2 - h_2 )+ (h_3 - h_3)$

Here the 0 show that there was no bounce back to the point where Billy released the ball

$\Delta H = (0 - 1 ) + ( 0.8- 0.8 ) + (0.5 - 0.5 )+ (0.2 - 0.2)$

=> $\Delta H = - 1 \ m$

Generally the distance covered by the ball is mathematically represented as

$D = h + 2h_2 + 2h_3 + 2h_3$

The 2 shows that the ball traveled the height two times

$D = 1 + 2* 0.8 + 2* 0.5 + 2* 0.2$

=> $D = 4 \ m$

5 0

3 years ago

Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 12,500kg. The thrust of its engines is 2

Nimfa-mama [501]

Answer:

The acceleration due to gravity on the surface of the Moon is approximately 1.625 m/s2, about 16.6% that on Earth's surface or 0.166 ɡ.

gravity of the moon is 1.62 m/s²

7 0

3 years ago

Of the four states of matter, which has particles that are the most tightly packed together?

iren2701 [21]

Depending on what you are working with, it would be a solid

4 0

3 years ago

Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. (Membranes are dis

Arturiano [62]

Answer:

Voltage, V = 0.0524 volts

Explanation:

Thickness of the membrane, $d=7.95\ nm=7.95\times 10^{-9}\ m$

Electric field strength, $E=6.6\ MV/m=6.6\times 10^6\ V/m$

We need to find the voltage across it. The relationship between the voltage, electric field and the distance is given by :

$V=E\times d$

$V=6.6\times 10^6\ V/m\times 7.95\times 10^{-9}$

V = 0.0524 volts

So, the voltage across the thick membrane is 0.0524 volts. Hence, this is the required solution.

7 0

3 years ago

Nevermind i dont need it anymore! thank you.

Sidana [21]

it's alright ok fine ! no problem you most welcome!

3 0

2 years ago