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3 years ago

Why do scientist use light years instead to measure space instead of kilometers?

2 answers:

8 0

A light year is also a theoretical distance, meaning that we do not actually have a tool for measuring it, like we do meter sticks. Also, think about the vastness of space. The light we see from stars are about 1/64 of the Milky Way Galaxy, if not less. So yes, light years greatly reduces the amount of numbers used to measure distance. Using kilometers would be much too cumbersome.

IrinaK [193]3 years ago

5 0

The reason scientists use light years instead of kilometres is becasue a light year is the distance traveled by light in one year, and if we actually did the math (ill just give it to you) $9.4605289*10^{15} meters$ to put that into perspective a kilometer is 1000 meters or $1.0*10^{3} meters$ . if they mesured everything in kilometers they would have to use even bigger numbers than they already do.

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Answer:

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Explanation:

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3 years ago

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6. The electric field caused by an electron is weakest near the electron.

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6. "The electric field caused by an electron is weakest near the electron" is FALSE.

7. "An electric field becomes weaker as distance from the electron increase" is TRUE.

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The "electrical field" covers the electrical charge and exerts, attracts or repels other charges in the field.The electric field caused by an electron is strongest near the electron while it become weak as distance from the electron increase.

The reason behind is, at a point the direction of the field line is at that point the direction of the field. The relative magnitude of the electric field will be proportional to the field line density. The field is strongest where the field lines are near together and when the field lines are at increasing distance the field is weakest.

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3 years ago

Identify and sketch all the external forces acting on the chair. Because the chair can be represented as a point particle of mas

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Answer:

y axis normal (N) and the weight (W)

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If we have a chair on a horizontal surface, the normal (N) and the weight (W) of the body act on the vertical axis.

On the x axis, the applied force (F) acts in the direction of movement and the friction force (fr) in the opposite direction of movement.

In this exercise we assume that the body tends to move to the right, all the forces can be seen in the adjoint

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2 years ago

A car moving at constant speed in a straight line with the engine providing a driving force equal to the resistive force F.

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3 years ago

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Answer:

Explanation:

A fictional force (also called force of inertia, pseudo-force, or force of d'Alembert, 5), is a force that appears when describing a movement with respect to a non-inertial reference system, and that therefore it does not correspond to a genuine force in the context of the description of the movement that Newton's laws are enunciated for inertial reference systems.

The forces of inertia are, therefore, corrective terms to the real forces, which ensure that the formalism of Newton's laws can be applied unchanged to phenomena described with respect to a non-inertial reference system. The correct answer is A.

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3 years ago