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4 years ago

How many electrons point in 2 second in a wire carrying a current of 20mA ?

Physics

1 answer:

Afina-wow [57]4 years ago

6 0

Answer and working shown on photo, final answer for number electrons=2.5*10^17 electrons

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3 years ago

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A 50.0 kg crate is being pulled along a horizontal, smooth surface. The pulling force is 10.0 N and is directed 20.0 degree abov

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Explanation:

It is given that,

Mass of the crate, m = 50 kg

Force acting on the crate, F = 10 N

Angle with horizontal, $\theta=20^{\circ}$

Let N is the normal force acting on the crate. Using the free body diagram of the crate. It is clear that,

$N=mg-F\ sin\theta$

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If a is the acceleration of the crate. The horizontal component of force is balanced by the applied forces as :

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$a=0.188\ m/s^2$

So, the normal force the crate and the magnitude of the acceleration of the crate is 487 N and $0.188\ m/s^2$ respectively.

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3 years ago

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4 years ago

How is light different than mechanical waves?

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3 years ago

astone is thrown upwards with an initial velocity of 25m/s atan angle of 30 to the ground.what is the work out the stones horiza

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Answer:

Range is 62.5 metres

Explanation:

Time of flight

$t = \frac{2u \sin( \theta) }{g}$

for range, acceleration is zero

from second newton's equation:

$S = ut + \frac{1}{2} {at}^{2}$

but a = 0:

let range be x:

$x = ut \\ x = \frac{2 {u}^{2} \sin( \theta) }{g} \\ \\ x = \frac{ \{2 \times 25 {}^{2} \sin(30 \degree) \}}{10} \\ \\ x = 62.5 \: metres$

[ taken g to be 10 m/s² ]

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3 years ago

How many electrons point in 2 second in a wire carrying a current of 20mA ?​

How many electrons point in 2 second in a wire carrying a current of 20mA ?