Logs And Richter Scale, Decibels Essay

715 words - 3 pages

Ilaria tena
ISP 121
Logs and Richter Scale, Decibels
Due: Wednesday, February 27th
Open the file found on the .  You will use this file for both parts below.  Click on the worksheet tabs at the bottom to access the decibel data.
 1. Richter scale
The Richter scale is used to measure the intensity of earthquakes.  It is a logarithmic relationship with the following formula:
 R = log(I)
 I is the intensity of the earthquake and R is the number on the Richter scale. 
(Remember that if there is no base written with the log it is base 10).  Converting the above formula from log form to exponent form would give us:
10R = I
Which version you use depends on which variable you are given. 
Since the Richter scale is logarithmic, an increase of 1 on the Richter scale translates to 10 times increase in intensity.  An R of 2 means an intensity of 100 while an R of 3 has an intensity of 1000 which is 10 times larger than the previous intensity.
 a) Open the ...view middle of the document...

It depends where the earthquake occurs. If it happens in a small town it will cause more deaths than if it has the same intensity and it happens in a larger city.
 d) If one earthquake had a Richter number of 5 and another had a Richter number of 7, how many times more intense would the second one be than the first?
100 times more intense.
 e) If one earthquake had an intensity of 8,000,000 and another had an intensity of 80,000,000 how, specifically, would their Richter numbers compare?
The number with the higher intensity has a larger Richter number.
2. Decibels
 Decibels are a measurement of sound intensity.  The logarithmic relationship between intensity of a sound and sound level in decibels is given by the following formula:
 L = 10 * log ( I/Io)
 L is the sound level in decibels, I is the intensity of the sound, and Io is the intensity of the softest sound that can be heard by humans.
I/Io is a ratio.  This ratio is how many times louder a sound is than the softest audible sound. For this activity, we will only consider the ratio and not the individual pieces of the ratio.
a) Convert the above formula to exponent form. (See lecture notes)
 b) Open the decibels worksheet.  Using the formula above and the converted version from part a), fill in the empty cells with either the decibels or the ratios of the intensities.  Copy and paste the table into your Word document. 
 c) What does it mean mathematically about the ratio of intensity for one sound to be 10 decibels louder than another sound? If one sound is 10dB louder than another it just raises the other power exponentially.
 d) The following statement is incorrect.
“A jet airplane landing at the local airport makes 120 decibels of noise.  If we allow three jets to land at the same time, there will be 360 decibels of noise pollution.”
 If one jet airplane makes 120 decibels of noise, what would the ratio of intensities be for one plane? 120dB=10^12 one plain

What would the ratio of intensities be for all three planes?
120dB=10^12 one plain
10^13=130db two plains
10^14=140db three plains
What would the decibel level be for the three jets?  Is it 360 decibels as claimed above?
It would be 140 dB, 360 is not correct because everyone would be deaf.

Other Papers Like Logs and Richter Scale, Decibels

Eathquakes Essay

1225 words - 5 pages parts of Devon and Cornwall, on the 25th of November 2013 police said today. People who felt the tremors described their fears as floors and walls shook. The quake occurred just before midnight and its epicenter was in the Bristol Channel 25 miles (40kms) west of Bude on the Cornish coast, a spokesman for the British Geological Survey said. "The earthquake measured 3.6 on the Richter scale and there were reports of houses vibrating and rumbling

Understanding And Preparation Of Earthquake Essay

946 words - 4 pages vibration, and combination of primary (P) and secondary (S) of vibrations (HarperCollins Publishers, 2003). It can be measuring by the Richter scale. An earthquake is a natural geological phenomenon and more than 30,000 earthquakes that strong enough to felt by worldwide. It caused by the fast release of elastic energy stored in rock which been subject to great stress. Once the rock is strained beyond its breaking point it ruptures

The Earthquake in Assam

843 words - 4 pages . Measurement of earthquake magnitude is done after the occurrence by use of a Richter which measures the energy released and Mercalli scale that is used to measure the intensity at the location where the earthquake occurred (Steinbrugger 1982). The effects of earthquakes vary depending on the intensity. The strongest earthquake can cause rapture of the ground damaging dams, bridges, roads, railroad tracks and building foundations. Some cases might


904 words - 4 pages energy is turned into forcible vibrations known as earthquakes (Murck, Skinner, Mackenzie, 2008). These tremors are measurable despite the fact that they cannot be predicted by scales which specifies the intensity of an earthquake. By far, the most acknowledged scale is the Richter Magnitude Scale which was conceived by Charles Richter in 1935. This particular scale is dependent upon the amplitudes of volatile waves registered on a device

Earth Pollution

3381 words - 14 pages hazardous wastes are generated each year. The United States alone produces about 250 million metric tons—70 percent from the chemical industry. The use, storage, transportation, and disposal of these substances pose serious environmental and health risks. Even brief exposure to some of these materials can cause cancer, birth defects, nervous system disorders, and death. Large-scale releases of hazardous materials may cause thousands of deaths and

Discription Of The Great Alaskan Earthquake Of 1964. Including The Environmental Science That Caused It To Happen

818 words - 4 pages On March 27, 1964 an earthquake shook Anchorage Alaska. It was 5:36 P.M. local time. The quake registered 8.6 on the Richter scale, although scientists now favor a different magnitude scale for very lage quakes that shows it at 9.2. This made it the largest quake that has hit the United States in recorded history, and second largest known worldwide. The earthquake started with a few seconds of small tremors. The tremors quickly developed into

Math 211 Course Syllabus

2365 words - 10 pages scientific notation in the real world? Provide an example where scientific notation would be used in your profession. • Why are real-world quantities, such as the Richter scale and the decibel scale, measured using logarithms? List at least one other real-world quantity that is measured using a logarithm scale. • Part of a consumer price index (CPI) table follows. Suppose that a salary was $64,000 in 1985. What would the salary have to


1127 words - 5 pages destructive because they travel at a lower wavelength which means they have a larger amplitude. This increase in amplitude is destructive to things such as buildings because they cannot handle the type of vibrations an S wave may cause. Charles Richter developed the Richter magnitude test scale in 1935. This test assigns a single number to quantify the size of an earthquake. It is a base-10 logarithmic scale obtained by calculating the logarithm of the

San Francisco Earthquake 1906

888 words - 4 pages Angeles, California and east into the state of Nevada. Unfortunately, since the earthquake was an 8.3 on the Richter scale more than 3,000 people were killed, while 225,000 people were left homeless. Thousands of people were left homeless after the earthquake disrupted about 12,000 square miles of land. It has been said that one of the reasons why the 1906 earthquake caused so much damage, was that parts of San Francisco were built on land that

Omega Research Inc. – A Case Study

2969 words - 12 pages LAN’s. 5. All machines run antivirus software although local IT staff infrequently maintains their definition files and relies on user intervention to perform file updates. No machine has spyware protection. 6. There is no dedicated program for training employees on avoiding threats like, say, Phishing. 7. Firewall logs, host packet analysis, application logs, event and error logs are generally ignored across the board. Business

Phi 210 Quiz 2

937 words - 4 pages the Richter scale. Therefore, the building can withstand an earthquake of 9.5 on the Richter scale.Answer | | Selected Answer: |   Composition | Correct Answer: |   Composition | * Question 16 5 out of 5 points Molecules are in constant random motion. The Statue of Liberty is composed of molecules. Therefore, the Statue of Liberty is in constant random motion.Answer | | | | Selected Answer: |   Composition | Correct Answer

Related Essays

Ricchter Number Essay

624 words - 3 pages 1. Richter scale The Richter scale is used to measure the intensity of earthquakes. It is a logarithmic relationship with the following formula: R = log(I) I is the intensity of the earthquake and R is the number on the Richter scale. (Remember that if there is no base written with the log it is base 10). Don’t be scared off by logs. Think of them as a short-cut way of writing large numbers. For example, let’s say the intensity

Teest Sampe Essay

1086 words - 5 pages service portfolio / establishment of contract development services Building up of development centre in Hamburg Planning and start of construction of the new large scale GMP facility in Bovenau First long-term commercial development and supply agreement for large scale facility signed Initiation of GMP production in Bovenau Acquisition by Gedeon Richter Plc and HELM AG Start of in-house development projects Fully remodelled Hannover facility in

Earthquakes Essay

913 words - 4 pages measure the magnitude of an earthquake; this device is called the Richter magnitude scale. The Richter scale is a logarithmic scale that measures ground movement with a seismograph and can calculate the magnitude of an earthquake by the height of the waves listed on the seismograph. Each whole number increase in Richter magnitude means that the ground motion of the quake is ten times the amount of the previous number. Another type of measurement

Geology; Earthquakes Essay

1071 words - 5 pages the sourced of the earthquakes Intensity scale Modified Mercalli Intensity Scale was developed using California buildings as it’s standards The drawback of intensity scales is that destruction may not be a true measure of the earthquake’s actual severity Magnitude scales Richter magnitude- concept introduce by Charles Richter in 1935 Richter scale • based on the amplitude of the largest seismic