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3 years ago

Se necesita fuerza continua para el movimiento continuo?

1 answer:

8 0

¿Se necesita fuerza continua para un movimiento continuo? No exactamente, ya que la fuerza que se aplica para mantener un objeto en movimiento solo se usa para que la fuerza de fricción pueda ser contrarrestada. Si un astronauta arrojara, digamos, una computadora portátil al espacio durante una caminata espacial (por qué arrojar una tableta perfectamente buena en el esquema interminable del cosmos, no lo sé), viajaría con una velocidad constante para siempre, a menos que golpea algo También podría reemplazar la computadora portátil con Voyager 2, que se mantuvo en movimiento y ahora está fuera de nuestro sistema solar. Esto se debe a que el espacio está mayormente vacío y no habría ninguna fuerza de fricción que actúe sobre esa roca. A menos que sea golpeado por un asteriodo o algo así, lo que haría una pregunta física diferente.

Espero que esto ayude, ¡TENGA UN DÍA BENDITO Y MARAVILLOSO! ¡Y un gran fin de semana de Superbowl! :-)

- Cutiepatutie ☺❀❤

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You need to substitute in the correct numbers.
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3 years ago

In an intergalactic competition, spaceship pilots compete to see who can cover the distance between two asteroids in the short-

pogonyaev

Answer:

a) truc is C, b) correct result is the B

Explanation:

As the speed of the competition is very high, for the judges the speed is

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v = 3 109 m / 20

v = 1.5 108 m / s

This is half the speed of light. For these high speeds we must use the relations of special relativity.

For the time t = to γ

For distance L = Lo / γ

γ = √ (1-v2 / c2)

Own time and distance (to and Lo) corresponds to the observer who is not moving the judges in this case

Let's look for the range value

γ = 1 / √ (1 - (1.5 / 3) 2) = 1 / 0.866 = 1.15

The time t = 20 1.15 = 23 s

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From these results we see that time increases and the distance is shorter.

Let's review the claims

A) False. It's the opposite

B) False

C) True. It is according to the result found

D) False.

In the nuclear fusion process, we will also use the special relativity that has a relationship between energy and mass

ΔE = c² Δm

As in the process energy is released, for the law of conservation of the mass of energy to be fulfilled, the total mass of the products, He atom, must be reduced.

Therefore the correct result is the B

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3 years ago

Which types of geometrical symmetry does a sphere have?.

Helen [10]

A sphere has reflection symmetry across any plane through its center.

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2 years ago

By increasing the circuits resistance R, in a capacitive circuit the phase difference between the current in the circuit and pot

oksian1 [2.3K]

Answer:

B) Gets smaller

Explanation:

The difference of phase between current and voltage in a AC circuit is the phase angle and it depends on the value of Z ( circuit impedance)

Z = R + X where R is the resistive component and X the reactance component, which is due either to a presence of an inductor or a capacitor. In any case the total impedance depends on R the resistive, and the phase angle φ is:

tan⁻¹ φ = X/R

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3 years ago

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3 years ago