The ground receives more light (heat) from the sun when:

Physics

1 answer:

gizmo_the_mogwai [7]2 years ago

3 0

Answer:

The answer is A.

Explanation:

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Two speakers separated by a distance of 4.40 m emit sound. The speakers have opposite phase. A person listens from a location 3.

Hoochie [10]

Answer:

f = 147.21 Hz

Explanation:

In order to have a destructive interference, as the source emit in opposite phases, the path difference between the distance to the person, measured in a straight line from the speakers, must be equal to an integer number of wavelengths.

We need to know the distance from the listener to the other speaker, located 4.4 m from the one which is directly in front of him, which we can find using Pythagorean theorem, as follows:

l₂ = √(3)²+(4.4)² = 5.33 m

The difference in path will be, then:

d = l₂-l₁ = 5.33 m - 3.00 m = 2.33 m

For the lowest frequency that gives destructive interference, the wavelength will be highest possible, which happens when the distance is just one wavelength.

⇒ d = λ = 2.33 m

In any wave, there exists a fixed relationship between speed, frequency and wavelength, as follows:

v = λ*f Κ ⇒ f = v/λ

Taking the speed of sound as 343 m/s, and solving for f, we get:

f= 343 m/s / 2.33 m = 147.21 Hz

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3 years ago

Name and draw the devices that can convert digital signal to analog.

Elodia [21]

Answer:

modem, digital music players, optical communication

Explanation:

Photos of devices are attached. An example of R2R logic circuit is also attached. DAC conversion is also done via pulse code modulation

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3 years ago

Explain electrostatic force

rosijanka [135]

Answer:

Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, or electron, was thus the source of the word 'electricity'.

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2 years ago

What is the term for the process by which a portion of a glacier breaks off and falls into the water

zhenek [66]

The term for the process by which a portion of a glacier breaks off and falls into the water is called calving.

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3 years ago

You perform an experiment with a long column of air and a tuning fork. The column of air is defined by a very long vertical plas

velikii [3]

Answer:

$\lambda=4L=1.33m$