High intensity sounds are perceived as relatively loud sounds. The sound waves which are most intense and perceived as loud sounds are those which have a ______ . Identify the one characteristic which is unique of such sound waves.

Answers

Answer 1

Answer:

Explanation:

loud sound depends on amplitude, intensity, frequency and energy.

as already mention high intensity sounds are perceived as loud sounds.

and the intensity of the sound is the rate at which the energy through a cross sectional area of a medium. higher intensity means higher amplitude. if we put more energy as source means we providing higher amplitude vibrations to the particles which cause the increase in intensity result is louder sound.

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A car that is initially moving to the right with a velocity of 4 m/s is pushed by a -5 N force as it moves from 5 meters to 20 meters. How much work is done to the car by this force?

Answers

Answer:

the work done on the car by the applied force is 75 J.

Explanation:

Given;

initial velocity of the car, v = 4 m/s

applied force in opposite direction, F = 5N

initial position of the car, x₀ = 5 m

final position of the car, x₁ = 20 m

displacement of the car, Δx = x₁ - x₀ = 20 m - 5m

= 15 m

The work done on the car by the applied force is calculated as follows;

W = F.Δx

W = 5 x 15

W = 75 J

Therefore, the work done on the car by the applied force is 75 J.

How long does it take the moon to go from full-moon phase to new-moon phase

Answers

A complete cycle of phases is 29.531 days.
From full-moon to new-moon is half of that.

Answer:

About two weeks (15 days to be exact)

Explanation: Look at this cool emoji thing I did :)

⁣Scroll fast!

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In lifting a small fridge weighing 240N, a potential energy change of 80J takes place. How high is the fridge lifted. Gravity=10 N/Kg

Answers

Explanation:

Potential Energy = mg h mg = 240 N

80 = 240 h

h = 80 / 240 = 1/3 meter ( 33.3 cm)

Explain why ultra-high voltages are
used to carry electricity over transmission lines.

Answers

Well, let's take it the other way. If you have a rather low voltage (220 volts -- Europe -- is low) you'd get a high current, which more easily dissipates as heat, resulting in loss of energy. Using a high voltage you have a low current which could easily be transported with almost no loss.

The visible surface of the Sun, which is also the deepest layer we can see with our eyes, is in which region of the Sun?

Answers

It is the photosphere

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C. a direct comparison between two things
D. an extreme exaggeration or overstatement

Answers

the answer is A because B is not right. C is incorrect and D well that doesn't makes since in it. the definition is the attribution of human nature or character inanimate, animals, object or abstract notation, especially as a rhetorical figure.

A. Think of it as person-ification. Such as "The flame of the candle DANCED in the dark" Now I don't know about you, but I've never seen a candle or a flame dance before!

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