PHYSICS HIGH SCHOOL

Which statement is true about the loudness of sound?A. It is directly proportional to the distance of the listener from the source.

B. It is inversely proportional to the square of the distance of the listener from the source.

C. It is directly proportional to the square of the distance between the listener from the source.

D. It is inversely proportional to the distance between the listener from the source.

Answers

Answer 1

Answer:

Answer : The correct option is, (B)

Explanation :

There is a direct relation between the loudness of sound and the intensity of sound.

$L=10\log (I)/(I_o)$ ..........(1)

where,

L = loudness of sound

I = intensity of sound

$I_o$ = intensity of reference

From this we conclude that the loudness is directly proportional to the intensity of the sound.

There is an indirect relation between the intensity of sound and the distance of the listener from the source.

$(I_1)/(I_2)=((d_2)/(d_1))^2$ ...................(2)

From this we conclude that the intensity of sound is inversely proportional to the square of the distance of the listener from the source.

From equation (1) and (2) we conclude that the loudness of sound is inversely proportional to the square of the distance of the listener from the source.

Hence, the correct option is, (B)

Answer 2

Answer: Just like the gravitational force, the electrostatic force, the perceived
brightness of a light, and the strength of a radio station . . .

The loudness of a sound is inversely proportional to the square of
the distance between the observer and the source.

Related Questions

Which is larger? 1 L or 1 m ³
Manuel releases a pendulum bob. The drawing shows its path. At which point does the pendulum bob have the most gravitational potential energy? a. no differences b. point D c. point B d. point C
The force of attraction between things that have mass is called ________________.
Which pair of terms best describes a wooden table?
What happens in a neutralization reaction?

A whale comes to the surface to breathe and then dives at an angle of 20.0 ∘ below the horizontal. If the whale continues in a straight line for 200 m , how deep is it?

Answers

Answer:

The depth is 68.4 meters.

Explanation:

In this question the whale rose to the surface of the ocean to breath and then dives into the ocean at an angle of 20° below the horizontal line. It then travels 200 m straight along this line. We have to determine the depth of the ocean.

The path of the whale forms the hypotenuse of a right triangle and the angle between the hypotenuse and base is given as 20°. Determination of sides or angles in a right triangle can be determines using trigonometry.

sinθ = $((opposite \ side))/(hypotenuse)$

opposite side = sinθ $* hypotenuse$

Here θ = 20°

sinθ = sin(20°) = 0.342

opposite side= $0.342 * 200 = 68.4 m$

Hence the depth is 68.4 m.

Answer:

It is 68.404 m deep.

Explanation:

The motion of the whale can be seen in the form of a right-angle triangle.

Angle of deviation = 20°

We know that, sinФ = Perpendicular/ Hypotenuse.

Here, hypotenuse = 200 m

Depth is perpendicular that we have to find.

sin(20°) = Depth/200

Depth = sin(20°) * 200 = 68.404 meters.

Which of the following statements are true regarding technology and learning? Select 3 options.Responses

Game-based learning tools are used for children only.
Game-based learning tools are used for children only.

Knowledge can be acquired throughout your life, through both formal and informal methods.
Knowledge can be acquired throughout your life, through both formal and informal methods.

Virtual reality simulations are being used for training in industries like healthcare and the armed forces.
Virtual reality simulations are being used for training in industries like healthcare and the armed forces.

Changes in technology both enable and require lifelong learning.
Changes in technology both enable and require lifelong learning.

Lifelong learning involves formal learning activities only.

Answers

Best answers:
1. Knowledge can be acquired throughout your life, through both formal and informal methods.

2. Virtual reality simulations are being used for training in industries like healthcare and the armed forces.

3. Changes in technology both enable and require life long learning.

A typical carbon atom has six protons, six neutrons, and six electrons. Which of these has the least amount of mass?A) one Proton
B) one Neutron
C) six Electrons
D) These masses are too tiny to measure

Answers

One proton or one neutron have very close to the same mass.

Their mass is about the same as the mass of 1,840 electrons !
So six electrons have roughly the same mass as 0.0033 of one
proton or one neutron.

Yes, these masses are very tiny. None of them was ever measured
until the 20th Century. But all of them have now been measured,
very precisely and accurately. This is very impressive, and should
give us a lot of admiration for scientists of the past hundred years.
It would be very interesting to look around online and find out
how they did it.

Beth has built a simple series circuit using wire, a battery, a lightbulb, and a switch. The bulb, however, does not light up when the switch is closed. Which describes a step that will help troubleshoot and work toward the solution of this problem?

A.
Reverse the way the wire is connected to the poles of the battery.

B.
Use an electrical meter to test the voltage of the battery.

C.
Shorten the length of wire between the battery and the switch.

D.
Change the wiring scheme to parallel.

Answers

The right answer for the question that is being asked and shown above is that: "A. Reverse the way the wire is connected to the poles of the battery." the statement describes a step that will help troubleshoot and work toward the solution of this problem is that Reverse the way the wire is connected to the poles of the battery.

Which phrase describes an atom?a positively charged electron cloud surrounding a positively charged nucleus
a positively charged electron cloud surrounding a negatively charged nucleus
a negatively charged electron cloud surrounding a positively charged nucleus
a negatively charged electron cloud surrounding a negatively charged nucleus

Answers

a negatively charged electron cloud surrounding a positively charged nucleus, the third one is the right answer.

Nucleus consists of electrically neutral neutrons and positively charged protons, so it is positively charged. Electrons, on the other hand are negatively charged. Electromagnetic force bounds atoms to the nucleus.

Final answer:

An atom is described as a negatively charged electron cloud surrounding a positively charged nucleus.

Explanation:

An atom is the basic unit of matter, consisting of a nucleus at its center, composed of protons and neutrons, and electrons orbiting the nucleus. It is the fundamental building block of elements, and the arrangement of electrons determines an atom's chemical properties.

An atom is described as a negatively charged electron cloud surrounding a positively charged nucleus. The nucleus of an atom contains positively charged protons and electrically neutral neutrons, while the negatively charged electrons exist in the electron cloud surrounding the nucleus. This model of the atom is known as the Bohr model, which accurately represents the distribution of electrons in an atom.

Learn more about atom structure here:

brainly.com/question/14156701

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We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. What is the BEST explanation for this?A) UV waves are longer and carry more energy.
B) UV waves are higher frequency and carry more energy.
C) UV waves have a lower frequency and carry more energy.
D) UV waves travel faster than visible light and have more energy.

Answers

The correct answer is
B) UV waves are higher frequency and carry more energy.

In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz ( $10^(12) Hz$ ), while ultraviolets (UV) have frequency higher than these values (at the order of 1 PHz, $1\cdot 10^(15)Hz$ ).

The energy of electromagnetic radiation is proportional to its frequency, according to the equation
$E=hf$
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.

UV waves are higher frequency and carry more energycausing exposure to UV waves in sunlight to skin cancer. This is a type ofelectromagnetic radiation similar to the waves of the radio, infrared, x-raysand gamma. All of which comes from the sun however cannot be seen by a humaneye. People use these rays for tanning however if it is overdone, it may causeskin problems.

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