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Elenna [48]
3 years ago
8

¿Cuál es el valor de la velocidad angular de una rueda que gira desplazándose a 15

Physics
1 answer:
Shalnov [3]3 years ago
8 0

Answer:

\omega = 75~rad/s

Explanation:

<u>Velocidad Angular</u>

Un objeto en rotación con movimiento circular uniforme describe ángulos iguales en tiempos iguales.

La velocidad angular ω es una magnitud que mide el ángulo θ que gira una partícula en cierto tiempo t, según la fórmula:

\displaystyle \omega = \frac{\theta}{t}

La velocidad angular suele medirse en radianes/segundo, revoluciones/minuto, grados/segundo, etc.

Si la rotación es uniforme, el valor de la velocidad angular es constante.

La rueda del problema a resolver se desplaza θ=15 rad en t=0.2 s, así que su velocidad angular es:

\displaystyle \omega = \frac{15~rad}{0.2~s}

\omega = 75~rad/s

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A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. The lightbulb is turned on for 0.010 hour, and the as
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Answer:

w =  - 508.53 joules

q = - 3091.47 joules

Explanation:

Let us convert the time in hours into seconds

0.010* 3600\\= 36

Change in internal energy

\delta E = p * \delta t

where E is the internal energy in Joules

p is the power in watts

and t is the time in seconds

\delta E = - 100 * 36\\

\delta E = - 3600 Joules

Amount of work done by the system

w = - P * \delta V

where P is the pressure and V is the volume

Substituting the given values in above equation, we get -

w = - 1 * ( 5.92 -0.90)\\

w = -5.02 liter-atmospheres

Work done in Joules

- 5.02 * 101.3\\= 508.53Joules

q = \delta E - w\\

Substituting the given values we get -

q = - 3600 - (-508.53)\\q = - 3091.47

Thus

w =  - 508.53 joules

q = - 3091.47 joules

7 0
3 years ago
When a 12 N horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of friction acting
Mrrafil [7]

Answer:

12N

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3 0
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If the height of the ramp was 1.2 m above the floor, how long would it take for the marble to hit the ground after it left the r
Evgesh-ka [11]
It would take at less 10 minte i guess this the right awnser

8 0
4 years ago
How are intensity sound and energy related
zubka84 [21]
Sound is a form of energy in that it consists fluctuations of air pressure . The speed of the fluctuations is measured in cycles per second or Hertz (HZ)

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4 years ago
The decomposition of ammonia to the elements is a first-order reaction with a half-life of 200 s at a certain temperature. How l
Feliz [49]

Based on the half-life of the reaction, time taken for the partial pressure of ammonia to decrease from 0.100 atm to 0.00625 atm is 800 seconds.

<h3>What is the half-life of a substance?</h3>

The half-life of a substance is the time taken for half the amount of atoms present in that substance to decay.

The half-life of the reaction is 200 seconds.

After, one half-life, pressure reduces to 0.0500 atm

After, two half-lives, pressure reduces to 0.0250 atm

After, three half-lives, pressure reduces to 0.01250 atm

After, four half-lives, pressure reduces to 0.00625 atm

Time taken = 4 * 200 = 800 seconds

Therefore, time taken for the partial pressure of ammonia to decrease from 0.100 atm to 0.00625 atm is 800 seconds.

Learn more about half-life at: brainly.com/question/26689704

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7 0
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