Answer:
There are many kinds of waves all around us. There are waves in the ocean and in lakes. Did you also know that there are also waves in the air? Sound travels through the air in waves and light is made up of waves of electromagnetic energy.
The wavelength of a wave describes how long the wave is. The distance from the "crest" (top) of one wave to the crest of the next wave is the wavelength. Alternately, we can measure from the "trough" (bottom) of one wave to the trough of the next wave and get the same value for the wavelength.
The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.
Light waves have very, very short wavelengths. Red light waves have wavelengths around 700 nanometers (nm), while blue and purple light have even shorter waves with wavelengths around 400 or 500 nm. Some radio waves, another type of electromagnetic radiation, have much longer waves than light, with wavelengths ranging from millimeters to kilometers.
Sound waves traveling through air have wavelengths from millimeters to meters. Low-pitch bass notes that humans can barely hear have huge wavelengths around 17 meters and frequencies around 20 hertz (Hz). Extremely high-pitched sounds that are on the other edge of the range that humans can hear have smaller wavelengths around 17 mm and frequencies around 20 kHz (kilohertz, or thousands of Hertz).
Explanation:
Answer:
Part A 2.88 A, PART B 28.82 mA PART C 0.288 mA
Explanation:
We have given angular frequency
Voltage source has an amplitude of 24.5 V, So V= 24.5 volt
Part A
We have given inductance
So inductive reactance
So current
Part B
We have given inductance
So inductive reactance
So current
Part C
We have given inductance
So inductive reactance
So current
Answer:
0.334 m
Explanation:
The magnetic field due to current in a straight thin wire, , is given by
where is the permeability of free spave with value and is the distance from the wire.
Substituting the values from the question,
Answer:
2.39 °C
Explanation:
Specific heat of water = 4187 j / kg °C (You eaither have to be given this, or know this or look it up)
100 g of water = .1 kg of water
1000 j / (.1 kg * °C) = 4187 j / (kg °C)
solve for C = 2.39°C
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Below are the choices and the answer is <span>B.
</span>a.) Models can be changed by scientists who are more famous than previous scientists.
<span>b.) As technology advances, new experiments often expose problems in accepted theories. </span>
<span>c.) Scientists tend to value new theories because they are more exciting. </span>
<span>d.) A newer theory is more valid because it uses more mathematics. </span>