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2 years ago

Which model shows how a comet's tail changes during its orbit?

Physics

2 answers:

Zielflug [23.3K]2 years ago

6 0

A comet tail changes during its orbit

pentagon [3]2 years ago

5 0

Third model shows how a comet's tail changes during its orbit...

mark brainliest

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Are aliens real in 2020

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Yes, they look exactly like newborn babies

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2 years ago

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A doctor observe areas of pink scaly skin on patient

murzikaleks [220]

Answer:

0-0 what is rhat supposed to mean. i dont think anyone can answer that lol

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2 years ago

Una bola de 1 kg gira alrededor de un circulovrtical en el extremo de un cuerda. El otro extremo de la cuerda esta fijo en el ce

Vladimir79 [104]

Answer:

La diferencia entre las tensiones máxima y mínima es de 19.614 newtons.

Explanation:

Puesto que la bola gira en un círculo vertical, existe claramente una diferencia entre las tensiones debido a la influencia de la gravedad y la tensión que resulta de la aceleración centrípeta experimentada por la masa. La máxima tensión ocurre cuando la bola se encuentra en el nadir (o la sima) del trayecto circular, la cual se describe por la Segunda Ley de Newton:

$T_{max} - m\cdot g = m\cdot \frac{v^{2}}{L}$

En cambio, la mínima tensión aparece cuando la bola se encuentra en el cénit (o la cima) del trayecto circular, descrita por la misma ley de Newton:

$T_{min} + m\cdot g = m\cdot \frac{v^{2}}{L}$

Donde:

$T_{min}$ , $T_{max}$ - Tensiones mínima y máxima, medidas en newtons.

$m$ - Masa de la bola, medida en kilogramos.

$g$ - Constante gravitacional, medida en metros por segundo al cuadrado.

$L$ - Distancia con respecto al eje de rotación, medida en metros.

$v$ - Rapidez tangencial, medido en metros por segundo.

Se elimina la aceleración centrípeta de ambas expresiones por igualación:

$T_{min} + m\cdot g = T_{max} - m\cdot g$

Ahora, la diferencia entre las tensiones máxima y mínima es:

$T_{max} - T_{min} = 2\cdot m \cdot g$

Si $m = 1\,kg$ y $g = 9.807\,\frac{m}{s^{2}}$ , entonces:

$T_{max} - T_{min} = 2\cdot (1\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)$

$T_{max}-T_{min} = 19.614\,N$

La diferencia entre las tensiones máxima y mínima es de 19.614 newtons.

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3 years ago

Cruise control should not be used _____.

KiRa [710]

D. in the rain. Because you could wreck with it on

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3 years ago

Which of the following statements is/are true? Check all that apply. Check all that apply. Power is the rate at which energy is

AlladinOne [14]

Answer:

True statements:

Power is the rate at which work is done.

Power is the rate at which energy is transformed.

The SI unit of power is watt.

A person is limited in the total work he or she can do by the rate at which energy can be transformed.

Explanation:

The above statements are true.

1. Power is defined as the rate at which work is done.

2. Power is the rate at which energy is transformed. Whenever energy changes its form, or moves from one place to another, the rate at which it makes those changes is described as power.

3. The SI Unit of power is watts. If 1 joule of energy is converted by an object in 1 second then its power is called one watt.

So, the statement<em> 'the SI unit of power is the horsepower' is</em> false.

4. A person is limited in the total work he or she can do by the rate at which energy can be transformed i.e, his power. He is not only limited by the total energy required.

So, the statement <em>'A person is limited in the total work he or she can do only by the total energy required'</em> is not completely true.

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3 years ago