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Andre45 [30]
3 years ago
12

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?

Physics
2 answers:
Svetradugi [14.3K]3 years ago
8 0

Answer:<u>C</u>

Select the correct answer.

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?

A.  

Move the machine to a different gravitational field.

B.  

Increase the friction between its moving parts.

C.  

Reduce the friction between its moving parts.

D.  

Redefine the machine’s system boundaries.

Explanation:

Lyrx [107]3 years ago
7 0
Reduce the friction between the moving parts.
I Hope I Helped You Out!
Feel free to mark brainliest!!!,
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In other words the instantaneous power of an angular accelerating body is the torque times the angular velocity

P=\tau\omega

Where

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Our values are given by

\tau = 630Nm

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The angular velocity must be transformed into radians per second then

\omega = 3200rev/min (\frac{2\pi rad}{60s})

\omega = 335.103rad/s

Replacing,

P=(630)(335.103)

P = 211.11*10^3W

P = 211.1kW

The average power delivered by the engine at this rotation rate is 211.1kW

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3 years ago
On level ground a shell is fired with an initial velocity of 49.0 m/s at 70.0 โ above the horizontal and feels no appreciable ai
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Answer:

Horizontal component = 16.8 m/s

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Explanation:

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v_y = v\sin\theta

v_x = (49.0\text{ m/s})\sin\,(70.0^\circ) = 46.0\text{ m/s}

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