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3 years ago

True or false the refraction of a wave is how many wavelengths pass a fixed point each second

Physics

2 answers:

Ksenya-84 [330]3 years ago

8 0

False. That description fits the wave's 'frequency'.
It has nothing to do with refraction.

professor190 [17]3 years ago

6 0

Answer:

False

Explanation:

- Refraction is the phenomenon that occurs when a light wave crosses the interface between two different mediums. Because of the different index of refraction of the two mediums (also called optical density), the speed of light in the two mediums is different, so the light changes direction.

- The definition described in the text of this problem, instead, is the definition of frequency. In fact, frequency of a wave is defined as the number of complete cycles (or of complete wavelengths) that pass a fixed point each second.

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The mass of a body:

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the mass of body increases when accelerated.

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3 years ago

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When an electron jumps from high-to low-energy levels:

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Answer:

B. A wave of visible light is produced.

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4 years ago

During exponential growth, the rate of growth

alekssr [168]

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4 years ago

When changing a tire sized 195/75 R15 to a 5 percent lower profile, the correct tire size would be _____

valentinak56 [21]

Answer and explanation:

When you are changing a car tire, the most important thing is to keep the total diameter as equal as possible.

The total car tire diameter can be calculated as:

$D_{tot orig}=\frac{195 \cdot 75}{2540 \cdot 2}+15''=26.5''$

The profile of this tire is 75 (the higher/taller relation), therefore a 5 percent lower profile would be:

pr=0.95·75=71.25

The problem is that the profiles are normalized and the nearest profile available is 70.

If we take a theorical tire with a profile of 71.25:

$D_{tot orig}=D_{new}\\\frac{195 \cdot 75}{2540 \cdot 2}+15''=\frac{X \cdot 71.25}{2540 \cdot 2}+15''\\X=205.26$

The theorical tire size should be 205/71 R15.

If we look for a real tire size, we should look for a tire with a diameter nearest to 26.5'' and a profile of 70.

The best option for real tire size is: Tire 225/70 R14 (wheel diameter of 26.4'') or 205/70 R15 (wheel diameter of 26.3'').

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4 years ago

An electromagnetic radio wave is received by a transmitter before it is converted to a sound wave. The radio wave has a waveleng

lakkis [162]

Answer: The velocity is the wave traveling at before the transmitter converts it to a sound wave is $2.99\times 10^8 m/s$

Explanation:

Wavelength of the electromagnetic wave = 23,076 m

Frequency of the wave = 13,000 Hertz

$\text{Time period}=\frac{1}{Frequency}$

$Velocity=\frac{displacement}{Time}=\frac{\lambda}{\text{Time period}}=\lambda \times Frequency=23,076\times 13,000 Hertz=2.99\times 10^8 m/s$

The velocity is the wave traveling at before the transmitter converts it to a sound wave is $2.99\times 10^8 m/s$

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3 years ago

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