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tino4ka555 [31]
4 years ago
14

Existe otra variable a tener en cuenta cuando de la aplicación de un trabajo se trata: el tiempo en que se aplica. Por ejemplo,

en el deporte de carreras de caballos se evidencia un ganador, así como el último en llegar. Si consideramos la misma trayectoria competitiva, podemos afirmar que los dos hicieron el mismo trabajo al llegar a la meta, sin embargo, el caballo ganador lo hizo más rápido. La magnitud física que permite determinar en qué difieren, entre el caballo ganador y el último en llegar, es la potencia. Entonces, ¿intervendrá la potencia muscular de los caballos?, ¿qué implica la magnitud que mide la rapidez con que se realiza un trabajo?, ¿se podrá generalizar a los motores, por ejemplo, de los vehículos? A continuación, los temas desarrollados ayudarán a la comprensión de esta nueva magnitud física.Rapidez para efectuar el trabajo: Sin duda alguna habrás observado en las construcciones el trabajo de las grúas para subir bloques hacia los pisos más altos. Considerando la figura, supongamos que disponemos de dos grúas para levantar bloques de un mismo peso y a la misma altura. En el momento de iniciar el desplazamiento vertical de la carga de bloques, se registra el tiempo y se advierte que la grúa de la izquierda se demoró menos tiempo. ¿Cuál crees que realizó más rápido el trabajo? Evidentemente la grúa de la izquierda. La medida de la rapidez para realizar un trabajo se denomina POTENCIA.
Physics
1 answer:
Bogdan [553]4 years ago
5 0

Answer: what

Explanation:

what

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An empty graduated cylinder weighs 55.26 g. When filled with 48.1 mL of an unknown liquid, it weighs 92.39 g. The density of the
katrin [286]
<h2>Density of the unknown liquid is 771.93 kg/m³</h2>

Explanation:

An empty graduated cylinder weighs 55.26 g

Weight of empty cylinder = 55.26 g = 0.05526 kg

Volume of liquid filled = 48.1 mL = 48.1 x 10⁻⁶ m³

Weight of cylinder plus liquid = 92.39 g = 0.09239 kg

Weight of liquid = 0.09239 - 0.05526

Weight of liquid = 0.03713 kg

We have

        Mass = Volume x Density

        0.03713 = 48.1 x 10⁻⁶ x Density

        Density = 771.93 kg/m³

Density of the unknown liquid is 771.93 kg/m³

5 0
3 years ago
Can u help pls it’s due now
QveST [7]

Answer:

a.She is moving in a constant speed

b.she is travelling ever 10 minutes every 1 distance

Explanation:

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3 years ago
A thin cylindrical shell is released from rest and rolls without slipping down an inclined ramp that makes an angle of 30° with
NNADVOKAT [17]

Answer: 1.59 sec

Explanation:

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The kinetic energy of translation is also 1/2 m v^2

so the total energy is m v^2

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Now equate

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4.9 m x 3.1 = m v^2

v^2 = 4.9 x 3.1

v = sqrt(4.9 x 3.1) = 3.9 m/s

Acceleration.

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4.9 x 3.1 = 2 x a x 3.1

4.9 = 2 a

a = 2.45 m/s^2

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T = v/a

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6 0
4 years ago
Which part of the electromagnetic spectrum has a lower frequency than visible light?
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Answer:

infrared

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3 years ago
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Mekhanik [1.2K]

Answer:

25.2 km east

Explanation:

The relationship between velocity and displacement is given by:

v=\frac{d}{t}

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v is the velocity

d is the displacement

t is the time

In this problem, we have:

v=7 m/s east is Rebecca's velocity

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Re-arranging the equation, we can find Rebecca's displacement:

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and the direction is same as velocity (east)

3 0
3 years ago
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