1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Verizon [17]
3 years ago
7

The wavelength of a wave can be found by measuring how high the wave is measuring how many waves pass a point in a second measur

ing the distance from the crest of one wave to the crest of the next wave measuring the distance from the crest of one wave to the trough of the next wave
Chemistry
1 answer:
Liono4ka [1.6K]3 years ago
6 0

Now that you know something about the properties of the two main types of waves (Lesson 43), we need to make sure that you can look at individual characteristics that waves can have.

<span>Not all waves are created equal!<span>You need to be able to see the specific “faces” that each wave can have, based on three important characteristics: frequency, wavelength, and amplitude.</span></span>Frequency

When we first started looking at SHM we defined period as the amount of time it takes for one cycle to complete... seconds per cycle

<span><span>Frequency is the same sort of idea, except we’re just going to flip things around.</span><span>Frequency is a measurement of how many cycles can happen in a certain amount of time… cycles per second.</span><span>If a motor is running so that it completes 50 revolutions in one second, I would say that it has a frequency of 50 Hertz.</span><span>Hertz is the unit of frequency, and just means how many cycles per second.<span><span>It is abbreviated as Hz.</span><span>It is named after Heinrich Hertz, one member of the Hertz family that made many important contributions to physics.</span></span></span><span>In formulas frequency appears as an "f".</span></span>

Since frequency and period are exact inverses of each other, there is a very basic pair of formulas you can use to calculate one if you know the other…

It is very easy to do these calculations on calculators using the x-1 button.

Example 1: The period of a pendulum is 4.5s. Determine the frequency of this pendulum.

<span>The period means that it will take 4.5 seconds for the pendulum to swing back and forth once. So, I expect that my frequency will be a decimal, since it will complete a fraction of a swing per second.</span>Wavelength

Wavelength is a property of a wave that most people (once they know what to look for) can spot quickly and easily, and use it as a way of telling waves apart. Look at the following diagram...

Figure 1<span><span>Any of the parts of the wave that are pointing up like mountains are called crests. Any part that is sloping down like a valley is a trough.</span><span>Wavelength is defined as the distance from a particular height on the wave to the next spot on the wave where it is at the same height and going in the same direction.Usually it is measured in metres, just like any length.</span><span>There isn’t a special spot you have to start on a wave to measure wavelength, just make sure you are back to the same height going in the same direction. Most people do like to measure from one crest to the next crest (or trough to trough), just because they are easy to spot.</span></span>Figure 2

On a longitudinal wave, the wavelength is measured as the distance between the middles of two compressions, or the middles of two expansions.

Figure 3

This leads us to one of the most important formulas you will use when studying waves.

<span><span>Frequency tells us how many waves are passing a point per second, the inverse of time.</span><span>Wavelength tells us the length of those waves in metres, almost like a displacement.</span><span>If we multiply these two together, we are really multiplying 1/s and m… which gives us m/s, the velocity of the wave!</span></span>

v = velocity of the wave (m/s)
f = frequency (Hz)
λ = wavelength (m)

Example 2: A wave is measured to have a frequency of 60Hz. If its wavelength is 24cm, determine how fast it is moving.

Example 3: The speed of light is always 3.00e8 m/s. Determine the frequency of red light which has a wavelength of 700nm.

Be careful when changing the 700nm into metres. Some people get really caught up with changing it into regular scientific notation with only one digit before the decimal. Why bother? It's only being used in a calculation. You’ll probably just make a mistake changing the power of 10, so just substitute in the power for the prefix and leave everything else alone…700 nm = 700 x 10-9 m since “nano” is 10-9.

Amplitude

Amplitude is a measure of how big the wave is.

<span>Imagine a wave in the ocean. It could be a little ripple or a giant tsunami.<span>What you are actually seeing are waves with different amplitudes.<span>They might have the exact same frequency and wavelength, but the amplitudes of the waves can be very different.</span></span></span>

The amplitude of a wave is measured as:

<span><span>the height from the equilibrium point to the highest point of a crest or</span><span>the depth from the equilibrium point to the lowest point of a trough</span></span>Figure 4

When you measure the amplitude of a wave, you are really looking at the energy of the wave.

<span>It takes more energy to make a bigger amplitude wave.<span>Anytime you need to remember this, just think of a home stereo’s amplifier… it makes the amplitude of the waves bigger by using more electrical energy.</span></span>
You might be interested in
Which type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electroneg
Ivan

Answer:

Ionic or electrovalent bonds

Explanation:

Ionic or electrovalent bonds are interatomic or intramolecular bonds which are formed between two kinds of atoms having a large electronegativity difference usually 2.1.

Electronegativity is the property that combines the ability of an atom to gain or lose electrons. It is expressed as the tendency with which atoms of elements attracts valence electrons in a chemical bond.

In this bond type, a metal transfers its electrons to a more electronegative atom which is a non-metal.

6 0
3 years ago
Read 2 more answers
HELP!!
irakobra [83]

Answer: In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Explanation:

8 0
2 years ago
A solid and a liquid are shaken together in a test tube to produce a clear blue liquid. Which of the following best describes th
harkovskaia [24]
<span>the behavior of the above pair of substances</span> is soluble

6 0
3 years ago
Heat energy is transferred on Earth by the processes of convection, conduction, and radiation. How does heat energy cause materi
lana66690 [7]
I think it will be D or B but my mine answer is D
5 0
3 years ago
The temperature at which a liquid becomes a solid is the:
Olenka [21]
The answer is "c" because solidification or freezing is the term used for the process in which a liquid becomes a solid.<span> Freezing is an exothermic process that also is an example of a phase transition</span>
3 0
3 years ago
Other questions:
  • If the natural abundance of Br−79 is 50.69 %, what is the natural abundance of Br−81?
    9·1 answer
  • A student determined that the weight-percent recovery for his isolated caffeine proved to be 1.5%. The student was concerned, ex
    11·1 answer
  • K+ and Po43- formula
    15·1 answer
  • In which cellular structure is food produced in plants
    15·1 answer
  • When elements that form a mineral dissolve in hot water, they form a mixture called a(n) ______.?
    15·1 answer
  • Last science question!! Thank you all for the help!
    9·1 answer
  • What are common chemicals used for lemons include fertilizer pesticide fungicide and herbicide chemicals that are typically util
    13·1 answer
  • Calculate the Mass of 3 Gram atom of Nitrogen ​
    11·1 answer
  • Select the correct answer from each drop-down menu.
    10·1 answer
  • If the pOH of a nitric acid (HNO3) solution is measured as 11, what is the concentration of HNO3 solution?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!