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Yuri [45]
3 years ago
8

This diagram shows how loud certain frequencies must be in order for people of different ages to hear them. The needed intensity

is called the "hearing level." A graph with age in years on the x axis from 20 to 70 and hearing level in decibels from 30 to 0. There are 5 graphs that are arcs that all start from point (25, 0) and end at points (70, 10), (70, 14), (70, 15), (70, 20), (70, 25) and (67, 35) and are labeled 500 Hertz, 1000 Hertz, 2000 Hertz, 3000 Hertz, 4000 Hertz and 6000 Hertz respectively. According to the graph, what is the maximum age at which a 4000 Hz sound wave with an intensity of 20 dB would be heard? 55 60 65 70

Physics
1 answer:
Sladkaya [172]3 years ago
3 0

Answer:

65 years

Explanation:

The arc that ends at 4000 Hz intersects the 20 db hearing intensity at 65 years.

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1. When does raising the temperature of a gas increase its pressure? when volume is increased and the number of particles is con
Neporo4naja [7]

Answer:

when volume and the number of particles are constant

Explanation:

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V is the volume.

n is the number of moles of substance.

R is the ideal gas constant.

T is the temperature.

Generally, raising the temperature of an ideal gas would increase its pressure when volume and the number of particles are constant.

This ultimately implies that, when volume and the number of particles are held constant, there would be a linear relationship between the temperature and pressure of a gas i.e temperature would be directly proportional to the pressure of the gas. Thus, an increase in the temperature of the gas would cause an increase in the pressure of the gas at constant volume and number of particles.

3 0
3 years ago
A dumped harmonic oscillator of a mass of 500 g has a period of 0.5 second. The amplitude of the oscillation is decreasing 2.0 %
inn [45]

Answer:

The answer is below

Explanation:

The amplitude decreases by 2%  during each oscillation. Hence the decrease in amplitude can be represented by an exponential decay in the form:

y = abˣ; where x ad y are variables, a is the initial value and b is the factor.

Let y represent the amplitude after x oscillations. Since the initial amplitude is 10 cm, hence:

a = 10 cm, b = 2% = 0.02.

Therefore:

y = 10(0.02)ˣ

The amplitude after 25 oscillations is gotten by substituting x = 25 into the equation. Hence:

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The amplitude after 25 oscillations is 3.355 * 10⁻⁴² cm

7 0
3 years ago
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FrozenT [24]

Answer:

No, you can't keep on dividing the charge forever.

Explanation:

No, you can't keep on dividing the charge in that manner forever because the total charge of the stick is an integer multiples of individual units known as an elementary charge, <em>which is the electron (e) charge (e = 1.602x10⁻¹⁹C)</em>.

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I hope it helps you!  

8 0
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