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4 years ago

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A piano of mass 852 kg is lifted to a height of 3.5 m. How much gravitational potential energy is added to the piano? Accelerati

on due to gravity is g = 9.8 m/s2.

1 answer:

Sedaia [141]4 years ago

4 0

Gravitational Potential Energy = Mass*Gravity*Height.

GPE = 852 * 9.8 * 3.2
GPE = 26718.72 Newtons.

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the loudness of a person's voice depends on the A. force with which air rushes across the vocal folds B. strength of the intrins

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Answer: A. force with which air rushes across the vocal folds

Explanation:

The human voice is produced in the larynx, whose essential part is the glottis. This is how the air coming from the lungs is forced during expiration through the glottis, making its two pairs of vocal folds to vibrate.

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3 years ago

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The hottest recorded temperature in the history of the United States is 134 °F, which is 57 °C. What would the speed of sound at

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365 m/s

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2 years ago

A transformer has a primary coil with 375 turns of wire and a secondary coil with 1,875 turns. An AC voltage source connected ac

Sonbull [250]

Answer:

The rms voltage (in V) measured across the secondary coil is 459.62 V

Explanation:

Given;

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The rms voltage (in V) measured across the secondary coil is calculated as;

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3 years ago

Two 84.5 g ice cubes are dropped into 30 g of water in a glass. If the water is initially at a temperature of 50 C and if the ic

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Answer:

final temperature will be 0 degree C

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Explanation:

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Heat given by water = heat absorbed by ice cubes

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4 0

3 years ago