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RUDIKE [14]
3 years ago
12

When an electric current flows through a long conductor, each free electron moves

Physics
1 answer:
ki77a [65]3 years ago
7 0
A. through a relatively short distance.

The speed is actually called the drift speed of the electron.
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A cube made Of an unknown material has a height of 9 symeters the mass of this cube is 3645 g. calculate the density of this cub
kherson [118]

Answer: 5 \frac{g}{cm^{3}}

Explanation:

The density \rho of a material is given by:

\rho=\frac{m}{V} (1)

Where:

m=3645 g is the mass of the cube

V is the volume of the cube

Now, the volume of a cube is equal to the length L of its edge to the power of 3:

V=L^{3} (2)

If we know L=9 cm, the volume of this cube is:

V=(9 cm)^{3}=729 cm^{3} (3)

Substituting (3) in (1):

\rho=\frac{3645 g}{729 cm^{3}} (4)

\rho=5 \frac{g}{cm^{3}} This is the density of the cube

8 0
4 years ago
Your new motorcycle weighs 2450 N.
Whitepunk [10]

Answer:

Explanation:

The negative only matters reallly if you are dealing with a 2d system. I could even define down as positive and up as negative. However, usually you are taught that down is negative. It really doesn't matter because a force is a force. It is only given a direction relative to another force or vector direction.

5 0
3 years ago
If a net force acting on a moving object causes its speed to increase, what
Klio2033 [76]

Answer:

It increases.

Explanation:

If a force acts in the same direction as the object's motion, then the force speeds the object up. Either way, a force will change the velocity of an object. And if the velocity of the object is changed, then the momentum of the object is changed.

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3 years ago
Do all babies look exactly like their parents? If no what are these differences called?
IgorLugansk [536]

Explanation:

no because of the geans of human being

3 0
3 years ago
What happens during mitosis
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During mitosis<span>, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells.</span>
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